Defending champion Djokovic brushed aside Adrian Mannarino, who was celebrating his 28th birthday, 6-4, 6-3, 7-6 (7/5) to reach the third round.

The top seed, bidding for a third consecutive title at the All England Club and fourth in all, will face either American 28th seed Sam Querrey or Thomaz Bellucci for a place in the last 16.

Djokovic's match was played under the roof of Centre Court as heavy rain brought chaos to the schedule.

Only 15 minutes of play was possible on the outside courts up to the late afternoon causing 22 singles matches to be cancelled and men's doubles ties to be reduced to best-of-three setters.

"Fortunately I was scheduled on Centre Court, that helps on days like this and when the roof is closed the atmosphere gets even more special," said 12-time major winner Djokovic.

"I do have a lot of expectations for myself but I am grateful that I am able to play at a high level so consistently. To have 30 Grand Slam wins in a row is a stat I am proud of."

Djokovic was followed onto Centre Court by a beaming Marcus Willis, the world number 772 who was facing 17-time Grand Slam winner Roger Federer as two tennis worlds collided.

Willis, who makes his living coaching children and senior citizens at a rowing club in the English midlands, has provided the feelgood factor of the week.

Having never played a tour match before Wimbledon, the sturdily-built left-hander, dubbed 'Cartman' after a portly character from cartoon series South Park, finds himself facing a man who has won 79 matches more than him at the All England Club.

Federer has career earnings just shy of USD 100 million; Willis has banked just $200 this year and still lives with his parents.

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