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TENNIS HEADLINES

U.S. Open doping loophole creates drug testing gap for U.S. players

U.S. Open doping loophole creates drug testing gap for U.S. players

In the last few years, tennis has spent millions on its anti-doping efforts and officials have extolled its tough drug testing policies. But a loophole has remained ajar right in the sport’s backyard: the U.S. Open.

MORE TENNIS HEADLINES

Upset Alert: Only three top-10 seeded women remain in U.S. Open

2014 US Open runner-up Wozniacki stunned in 2nd round

Caroline Wozniacki upset by Petra Cetkovska at U.S. Open

US Open Lookahead: Venus Williams could use tips from Serena

Drone crashes into stands during U.S. Open match; no injuries

U.S. Open Day 4 after dark: Wozniacki stumbles, Federer cruises

Down 2 sets to none, Murray comes back to win at US Open

Five thoughts on U.S. Open Day 4: Is it time to rethink best-of-five format?

AC too high? Italy's Errani laments cold US Open locker room

Fashion at the U.S. Open

U.S. Open 2015 Day 4

U.S. Open Day 5: Serena aims to shake off rust, Nadal faces tough test

Jack Sock faints during U.S. Open match, forced to retire

U.S. Open Day 4: Sock forced to retire due to heat; Halep, Murray advance

With renewed confidence and a bit of luck, Bouchard advances at U.S. Open

Latest on US Open: Errani overcomes dizziness to win in 3

Daily Data Viz: Comparing Djokovic, Murray, Federer, Wawrinka, Nadal

Nadal's army yearns to see him overcome struggles, return to old self

SI Tennis Podcast: Jon Wertheim chats with a candid Victoria Azarenka

U.S. Open Day 3 after dark: Djokovic cruises to victory, Venus advances

Hewitt, in final US Open, not relishing match vs countryman

U.S. Open Day 4 matches to watch: Azarenka, Federer, Wozniacki on Ashe

Five thoughts on Day 3: Bouchard shows promise, Serena is tested

Mardy Fish makes new memories at US Open in final match