Britain's Andy Murray maintained his record of never losing in the first round at Wimbledon with an encouraging win over Australia's James Duckworth.
After a slow start, likely a result of a recent abdominal injury, Murray found rhythm and his quality shone through.
The former world number one, now ranked 52nd, won 4-6 6-3 6-2 6-4 at 21:35 BST under the floodlights on Centre Court.
The 35-year-old Scot will now face big-serving American John Isner, seeded 20th, in the second round on Wednesday.
"It is amazing to be back out here again with a full crowd," said Murray, a two-time Wimbledon champion.