Sam Querrey

On a busy Monday in Miami, all of the women’s fourth-round matches unfold.  You can find a preview of all eight here in addition to a few of the remaining men’s third-round encounters.
Garbine Muguruza vs. Li Na:  Into the fourth round for the second straight Premier Mandatory tournament, the Spanish rising star continues to consolidate her position as a player to watch this year.  Indian Wells finalist Caroline Wozniacki became the latest player to learn about Muguruza’s ascendancy the hard way, thoroughly dismantled on Sunday.  A day later, the youngster trains her weapons on Li Na, who has produced consistently outstanding tennis in the few tournaments that she has played this year.  The Australian Open runner-up has lost only to Agnieszka Radwanska and Victoria Azarenka in 2013, although a knee injury sidelined her for several weeks after Melbourne.  When she returned this week, her ball-striking looked as clean if not as audacious as it had in January.  Never at her best in Miami, Li could turn a page now.
Serena Williams vs. Dominika Cibulkova:  Awaiting the winner of the previous match in the quarterfinals is the world No. 1, assuming that she can survive the test posed by the shortest woman in the top 30.  Cibulkova vanished from relevance after reaching the Sydney final, where Radwanska double-bageled her, but she pushed Serena’s predecessor in the spot to the brink in the same round here a year ago.  That match against Azarenka, for which she served twice, revealed how much her explosive forehand can threaten taller opponents with more effortless power.  Against a server like Serena, who struck 20 aces against her at Wimbledon in 2010, Cibulkova’s short wingspan may prevent her from creating pressure in return games and exploiting the erratic baseline play that Williams showed in the last round.
Grigor Dimitrov vs. Andy Murray:   The memory of what unfolded when he faced Novak Djokovic at Indian Wells may reverberate through Dimitrov’s mind if he takes a lead against Murray.  Serving for the first set that time, he conceded four double faults in a painful display of nerves.  Dimitrov also took Murray to a first-set tiebreak wen they met in the Brisbane final this year, only to lose the tiebreak decisively and fade thereafter.  Much more impressive than he looked at Indian Wells, Murray showed minimal mercy to another rising phenom in Bernard Tomic. His two-handed backhand should break down Dimitrov’s one-hander unless the Bulgarian enjoys an excellent serving day that allows him to dictate points with his forehand.
John Isner vs. Marin Cilic:  Among the stranger statistics of the ATP is Cilic’s undefeated record against Americans, which includes victories over playesr like Roddick and Querrey.  That perfection might continue against a giant exhausted from his epic victory over Ivan Dodig in the sweltering Miami heat.  Mired in a slump for the last several months, Isner will have gained confidence from winning the type of close match that he so often plays, but he generally does not recover well after winning them and does not have an impressive history in Miami.  The slow surface will blunt the serves of both men, a greater concern for Isner than the more balanced Cilic.
Maria Sharapova vs. Klara Zakopalova:  The only woman in the lower half of the women’s draw who has defeated Sharapova on a hard court, Zakopalova halted the other Russian Maria in the wake of the latter’s strong fortnight at Indian Wells.  That sole victory came a decade agao at the Australian Open, however, and the Czech subsided uneventfully when they met in Doha this February.  Sharapova struggled on serve when Zakopalova took her to a third set at Roland Garros last year, and she struggled on serve again on the windy afternoon of her previous match.  But she should break Zakopalova’s serve frequently with her rapier-like returns, keeping this counterpuncher on her heels from the outset.
Richard Gasquet vs. Mikhail Youzhny:  These two men have developed a reputation for suffering ignominious meltdowns, including an occasion here when Youzhny drew blood from his head by smashing his racket against it.  Another of those occasions featured the Frenchman surrendering a two-set lead to his fellow headcase at the Australian Open.  Well past his prime, the Russian still can uncork one-handed backhands scarcely less lovely than Gasquet’s signature shot.  Moreover, Youzhny has won four of their seven career meetings, surprising considering his opponent’s superior weapons.
Agnieszka Radwanska vs. Sloane Stephens:  The defending champion has suffered a lull in form since winning consecutive titles to start 2013, dominated by Li and Petra Kvitova before Kirilenko upset her at Indian Wells.  Radwanska dropped a set in the third round to Magdalena Rybarikova, a talented player but still a journeywoman, so she must raise her level against an Australian Open semifinalist.  That said, Stephens ate a bagel from Olga Govortsova in her first set of the tournament, and she had lost four of her previous five matches before that victory.  At Cincinnati last summer, she extended Radwanska to a third set despite lacking the firepower that normally troubles the Pole.  Something similar could happen here in a match filled with long rallies.
Milos Raonic vs. Sam Querrey:  Meeting for the fourth time since the start of 2012, these two giants play essentially the same styles in a matchup determined by execution on the day.  In that regard, one must give the edge to Raonic, who defeated Querrey comfortably at San Jose last month in avenging two losses to the American last year.  The slow outdoor courts of Miami favor the Canadian’s massive weapons and preference for short points much less than does the indoor arena in San Jose.  In rallying past former nemesis Lukasz Kubot, Querrey continued to look vulnerable in a year when few victories have come easily.  (Or, the more pessimistic might say, at all.)  This match should come down to first-serve percentage and focus, critical in a match that hinges upon a tiny handful of points and in which any mistake can prove fatal.
Ajla Tomljanovic vs. Kirsten Flipkens:  Recovered from a serious issue with blood clots last year, Flipkens reached the second week of the Australian Open and upset Kvitova yesterday in an oddly oscillating three-setter.  Some of her better results have come on grass, which showcases her biting slice and her fine hands at net.  Aligned opposite her is a Croat who clawed past Petkovic in a third-set tiebreak after upsetting Julia Goerges in the previous round.  Like Flipkens, Tomljanovic has struggled with sporadic injuries, and she has played only a handful of WTA tournaments in the last several months.  Transitioning overnight from the underdog to the favorite, the Belgian should fancy her chances to reach the most significant quarterfinal of her career.
Roberta Vinci vs. Alize Cornet:   In a section that imploded, either of these women plausibly could reach a semifinal and collect the valuable ranking points that come with it.  The main question regarding this match concerns whether Cornet can recover in time from a three-set victory that forced her to leave the court in a wheelchair.  On the other hand, Vinci needed plenty of energy to grind through a three-setter of her own against Suarez Navarro, testing the veteran’s stamina.  Her backhand slices could prove vital in testing the patience of an ever-edgy Cornet.
Sara Errani vs. Ana Ivanovic:  After the Serb had won their two previous meetings, the Italian turned the tables at Roland Garros last year in a match that Ivanovic controlled initially before letting it slip away.  The steadiness of Errani has allowed her to outlast streaky shot-makers like the former Roland Garros champion over the last year, but the latter displayed her best form in several months during her two victories here.  For her part, Errani has lost just five games in two matches, the fewest of any woman left in the draw.  If Ivanovic bursts to a fast start and sustains it, as she did against Kuznetsova, she could overwhelm this opponent before she settles.  If Errani can find her footing and extend the rallies, meanwhile, she could complicate the plot for a woman who prefers her matches straightforward.
Sorana Cirstea vs. Jelena Jankovic:  Until Jankovic won their most recent encounter in Dallas last summer, Cirstea had swept all of her meetings against an opponent consistently ranked higher than her, although each stretched into a final set and none came on an outdoor hard court.  The Romanian brunette managed to upset Kerber a round after barely eking out a victory over Silvia Soler-Espinosa, a pair of results that illustrates how wide her range of form extends.  Almost as impressive as the Kerber upset was Jankovic’s victory over Nadia Petrova, her seventh win in her last eight matches with the only loss coming in an airtight clash with Kuznetsova.  Both women thus should enter this match with confidence, and they eye a similar opportunity to Vinci and Cornet, the winner of whom would meet the winner of this match in the quarterfinals.