Heather Watson blamed nerves as she made a first-round exit at the US Open for the fifth straight year.
Top seed Novak Djokovic and defending champion Marin Cilic both won in straight sets on day one of the US Open.
2014 runner-up Kei Nishikori suffered a shock exit on day one of the US Open, losing to Frenchman Benoit Paire in five sets.
Rafael Nadal displayed glimpses of his best form in a first-round win over Borna Coric at the US Open.
Serena Williams strolled into the second round of the US Open after Vitalia Diatchenko was forced to withdraw.
Ana Ivanovic was the first major casualty of the US Open as she fell 6-3 3-6 6-3 to Dominika Cibulkova.
Laura Robson is starting to believe in herself again as she prepares to return to the US Open.
Former US Open champion Mats Wilander says Andy Murray's body language is still a key weakness against the top players.
Our Andy Schooler picks out his best bets for day one of the US Open at Flushing Meadows.
Our Andy Schooler says Andy Murray is primed to win a second US Open title.