Defending champion Roger Federer defeats Lukas Lacko while sisters Serena Williams and Venus Williams advance to the next round. Meanwhile, world number two Caroline Wozniacki suffers shock defeat against Ekaterina Makarova.
Roger Federer extended his flawless winning streak at Wimbledon to 26 consecutive sets as the defending champion crushed Lukas Lacko, while Serena Williams powered to her 16th successive win in Wednesday's second round action.
While Federer and Serena strolled, Caroline Wozniacki suffered fresh Wimbledon woe as the world number two suffered a shock 6-4, 1-6, 7-5 defeat against Ekaterina Makarova.
Meanwhile, five-time champion Venus Williams battled into the third round with a 4-6, 6-0, 6-1 win over Romanian qualifier Alexandra Dulgheru.
Federer shows class
Federer delivered a Centre Court masterclass lasting 89 minutes as the Swiss star hit 48 winners and 16 aces in his 6-4, 6-4, 6-1 victory.
The 36-year-old is now on his joint second longest streak of sets won at Wimbledon – his best was 34 between the third round in 2005 to the 2006 final.
Next up for Federer is a third round tie against German world number 64 Jan-Lennard Struff who came back from two sets down to defeat 39-year-old Ivo Karlovic 13-11 in the final set.
In his 20th Wimbledon appearance, top seed Federer, a 20-time major winner, is bidding to become only the second player to claim nine singles titles at the All England Club after Martina Navratilova.
"I played very well. I felt good out there, less nerves than in the first round," Federer said.
Serene routs Tomova
Federer wasn't the only former champion in peak form on Centre Court as seven-time winner Serena routed Bulgarian qualifier Viktoriya Tomova 6-1, 6-4.
Williams brushed aside Tomova in just 66 minutes with 24 winners and four aces to extend her streak of consecutive match wins at the All England Club.
"It was better than the first round. I'm happy I'm going in the right direction," Serena said.
"I'm getting there. I expect to get there, not only for Wimbledon but for the tournaments in the future."
Wozniacki fails to impress
Caroline Wozniacki, plagued by an invasion of flying ants during the Court One clash, saved five match points but has now failed to get past the last 16 in 12 visits to the All England Club.
It was a bitter defeat for the 27-year-old Dane, who was expected to challenge for the Wimbledon title after winning her maiden Grand Slam crown at the Australian Open in January.
With flying ants stuck in Wozniacki's hair and dive-bombing her throughout the match, the former world number one asked the umpire if there was something that could be sprayed to keep the bugs away.
"They're in my mouth and in my hair and everywhere – we need to do something. Is there a spray?" she said.
"I want to be here to focus on tennis, not eating bugs."
Struggle for Venus
Five-time champion Venus Williams made her 21st Wimbledon appearance, and the 38-year-old is the oldest woman in this year's tournament.
But she didn't look her age in making it 89 career match wins at Wimbledon by demolishing Dulgheru in the final two sets.
Asked if her wealth of Wimbledon experience was a key factor, Venus said: "I'd love to have that extra advantage. If that's working for me I'm all for it.
"It's just about winning the match. If that's your best or not doesn't matter."
Venus next faces Dutch 20th seed Kiki Bertens, who beat Russian world number 107 Anna Blinkova 6-4, 6-0.
Former world number one Karolina Pliskova finally made it to the third round on her seventh visit to Wimbledon after seeing off two-time Australian Open champion Victoria Azarenka 6-3, 6-3.
Former finalist Agnieszka Radwanska lost 7-5, 6-4 to Czech world number 66 Lucie Safarova.