Top-seeded Fabio Fognini retired with a right foot injury while trailing Michal Przysiezny of Poland 6-3, 5-3 Thursday in the second round of the St. Petersburg Open.
Second-ranked Victoria Azarenka withdrew from the Dubai Championships on Tuesday because of a bone bruise in her right foot.
Ivo Karlovic of Croatia has withdrawn from the Olympics because of a foot injury, and he'll be replaced by Philipp Petzschner of Germany.
Serena Williams has returned to the top 100 in the women's rankings after winning her first title in more than a year at Stanford on Sunday.
An MRI exam on Rafael Nadal's left foot does not show any injuries and the two-time Wimbledon champion expects to play in Wednesday's quarterfinals.
Is Rafael Nadal good enough to win Wimbledon on one good foot? We'll find out.
Defending champion Rafael Nadal overcame an aching left foot to reach the quarterfinals at Wimbledon with a 7-6 (6), 3-6, 7-6 (4), 6-4 win over Juan Martin del Potro on Monday.
Australian Open champion Kim Clijsters withdrew from Wimbledon on Wednesday because of a foot injury, leaving the women's field more wide open.
The latest victim of a freak foot injury, Kim Clijsters is still the one to beat at this year's French Open.
Serena Williams underwent emergency treatment for a blood clot in her lungs. Where does this leave the 13-time Grand Slam winner?
Serena Williams has withdrawn from the Australian Open because of a foot injury after winning the Grand Slam event the last two years.
Former French Open champion Carlos Moya has retired, citing a nagging foot injury in calling an end to his 15-year career.
Serena Williams says on her website she is "likely out for the year" because her injured right foot hasn't healed properly.
Top-seeded Caroline Wozniacki advanced to the Pan Pacific Open semifinals when Agnieszka Radwanska retired with a left foot injury in the first set.
Caroline Wozniacki has been seeded No. 1 at a Grand Slam tournament for the first time, getting the top spot at the U.S. Open because Serena Williams pulled out injured.
Maria Sharapova says she has pulled out of the Rogers Cup in Montreal because of a left foot injury.