Andy Murray is expecting a "weird" experience when he competes at this week's behind-closed-doors US Open.
The first Grand Slam since the outbreak of the Covid-19 pandemic is under way inside a safety bubble in New York.
"Mentally it's going to be difficult for the players," said Murray, who opens against Japan's Yoshihito Nishioka on Tuesday (17:00 BST).
British number one Johanna Konta faces compatriot Heather Watson about 18:00, with Dan Evans on court straight after.
Evans, the leading British male and the 23rd seed, takes on Brazilian youngster Thiago Seyboth Wild, who is playing in his first Grand Slam main-draw match.