Serena Williams and Roger Federer booked their places in the third round of Wimbledon on Wednesday with straight-set wins.
Federer did not drop a point on his serve in the entire second set and kept that streak going until he was 30-0 up at 4-1 in the third, when Lacko sent a backhand victor down the line.
Another effortless topspin-loaded swing from Federer, which claimed the opening break of the second set, was followed by a 60-second service game to pull away with a 4-2 lead.
In total, he lost just nine of 61 points on his serve and broke Lacko five times, including with a dynamic forehand victor to close out the match.
The 30-year-old Makarova took down Wozniacki 6-4, 1-6, 7-5 to bring the Danish star's tournament to a surprisingly quick conclusion.
But she didn´t look her age in making it 89 career match wins at Wimbledon by demolishing Dulgheru in the final two sets.
"I think it is important that, when you want to serve well, your point-for-point mentality is right", Federer said.
At one point, Federer had won 35 consecutive points on his serve.
Roger Federer's Wimbledon dominance is showing no signs of weakening as he breezed into the third round. I can't even be mad at myself, because I played up to the level that I can.
Five-time champion Venus Williams battled into the third round with a 4-6, 6-0, 6-1 win over Romanian qualifier Alexandra Dulgheru.
"It was better than my first round and I'm happy that I'm going in the right direction", said 25th-seeded Williams.
The 36-year-old, whose winning run encompasses her Wimbledon titles in 2015 and 2016, missed the grass-court Grand Slam last year while she prepared to give birth to daughter Alexis Olympia in September.
Lucas Pouille became the latest seeded player to exit the men's draw at Wimbledon after a 6-4, 6-2, 6-7 (8), 3-6, 6-2 defeat to Austrian qualifier Dennis Novak.
It's been an up and down season for Keys, but she has performed well at the majors - she reached last year's US Open final and this year's French Open semis, both of which she lost to compatriot and friend Sloane Stephens.