Britain's Andy Murray began his Wimbledon campaign with a testing win over Mikhail Kukushkin of Kazakhstan on a hot afternoon in south west London.
Murray, seeded third, won 6-4 7-6 (7-3) 6-4 in two hours and 13 minutes as the temperature hit 41C on Centre Court.
"It was a tough match. I made it hard for myself in the second set," said Murray.
The Scot joined British players Liam Broady, Aljaz Bedene and James Ward in round two, plus Heather Watson.
It is the first time since 2006 that four British men have made the second round, with Murray going on to face Dutchman Robin Haase.
"It's good for British tennis. The more wins and more players we can have in these events, it makes a difference," Murray said of the British success.