Eight-time Wimbledon champion Roger Federer overcame a first set scare to reach the second round on Tuesday beating South African debutant Lloyd Harris 3-6, 6-1, 6-2, 6-2.
Federer, whose great rival Rafael Nadal was also in action against Japanese qualifier Yuichi Sugita, took time to get going and was helped by his opponent suffering a calf problem midway through the match.
"I struggled early on, my legs were frozen and the ball was not going where I wanted it to," said Federer.
"He was hitting big and things were going quickly. I was nervous for a set and a half.
"So it took a good effort from me. Lloyd played a good match."
If Nadal comes through, he will renew his bitter rivalry with Nick Kyrgios after the combustible Australian claimed a 7-6 (7/4), 3-6, 7-6 (12/10), 0-6, 6-1 win over countryman Jordan Thompson.
However, while he progressed another of the top 10 seeds fell by the wayside—two-time French Open champion Dominic Thiem's lack of ease on grass being exposed by veteran American serve and volleyer Sam Querrey.
Querrey, a Wimbledon semifinalist in 2017, prevailed 6-7 (4/7), 7-6 (7/1), 6-3, 6-0.
