LONDON (AP)—French Open champion Rafael Nadal made a smooth adjustment from clay to grass Wednesday, beating Marcos Daniel in straight sets to reach the third round of the Queen’s Club tournament.

The top-seeded Nadal, who captured his fifth Roland Garros title on Sunday, enjoyed the perfect start to his Wimbledon preparations with a 6-2, 6-2 victory under rainy London skies.

The Spaniard, who had a bye in the first round, was joined in the last 16 by second-seeded Novak Djokovic, who beat Italy’s Paolo Lorenzi 6-3, 6-3, and No. 7 Sam Querrey, who knocked out fellow American Robby Ginepri 7-6 (4), 6-2.

It was Nadal’s first match on grass since his epic five-set win over Roger Federer in the 2008 Wimbledon final. Nadal missed the grass-court season last year with knee problems.

Nadal, who beat Robin Soderling in the French Open final Sunday to supplant Federer at No. 1 in the rankings, looked comfortable on the grass against his 112th-ranked Brazilian opponent.

“It’s difficult to adapt but I am happy to be back on grass, it is one of the surfaces I enjoy playing on,” said Nadal, who faces Uzbekistan’s Denis Istomin in the third round.

“After having the good results on grass … I start to believe I can play well on this surface. So that makes me feel a little bit better mentally when I come back here. But at the same time I need the time because I have to adapt, and that needs more days, I think.”

Play was stopped by light rain with Nadal leading 2-1 in the second set, and he signed autographs as he left the court. When play resumed after a 14-minute delay, Nadal broke at love to lead 4-2 when Daniel made a forehand error.

Djokovic struggled to gain the upper hand against Lorenzi, saving a break point in the opening game and then converting his only break point of the first set to lead 4-2.

The Serb was also under pressure early in the second set, fighting off three break points at 1-0 down before breaking for a 2-1 lead when Lorenzi netted a backhand volley.

Djokovic then had to survive two more break points before holding for 4-2, and a further break at 5-3 gave him victory.