NFL on Yahoo Sports:

Federer tops del Potro, reaches semis in London

AP - Sports
Federer advances to face Nadal in ATP semifinal

View gallery

Juan Martin Del Potro of Argentina shouts as he wins the first set against Roger Federer of Switzerland …

LONDON (AP) -- Six-time champion Roger Federer rallied past Juan Martin del Potro 4-6, 7-6 (2), 7-5 Saturday to reach the semifinals of the ATP World Tour Finals for an 11th time.

Federer will face top-ranked Rafael Nadal on Sunday, and Novak Djokovic will take on newcomer Stanislas Wawrinka in the other semifinal at the year-end tournament.

Federer and del Potro needed a win in their final round-robin match to advance from Group B.

Only once in 12 appearances has Federer failed to reach the final four. The 17-time Grand Slam winner has struggled this season, and the event featuring the top eight players is his last chance to win a big title in 2013.

Win cash prizes, pick a fantasy roster for just one day, join in minutes!

Learn how to play

Contest Entries Entry Fee Prizes Starts (EDT)
NFL $350K Baller [$50K to 1st] 2535/39773 $10 $350000 Sunday 1:00 PM Enter
NBA $15K Tournament [$2K to 1st] 1436/3410 $5 $15000 Today 7:00 PM Enter
NHL $3K Tournament [$300 to 1st] 207/681 $5 $3000 Today 7:00 PM Enter
View Comments (3)