Seven-times Wimbledon champion Novak Djokovic eased concerns about his knee with a clinical performance to dismantle Czech qualifier Vit Kopriva 6-1 6-2 6-2 and reach the second round.
Playing with a support on his right leg following a minor operation less than four weeks ago after a meniscus tear ended his French Open, the 37-year-old never faced a break point and needed a little less than two hours to prevail.
"I tried to really focus on the game and not think about the knee too much. Everything that I could do, I have done over the last three weeks along with my team to be able to play here for you today," Djokovic said.
Elsewhere, Russian sixth-seed Andrey Rublev crashed out in the first round on Tuesday, losing 6-4 5-7 6-2 7-6(5) to world No.122 Francisco Comesana of Argentina, playing his first ever match at a Grand Slam.
Comesana, 23, belied his lack of experience, playing with poise and control from the start.
Fourth seed Alexander Zverev eased to a 6-2 6-4 6-2 victory over Roberto Carballes Baena to get his latest bid for a maiden Grand Slam triumph up and running.
The German came up against a spirited Carballes Baena, who is 60 places below him in the world rankings, but his powerful serve and whipped forehand sent him through in straight sets.