"It was extremely complicated tonight", Federer was quoted as saying afterward on the ATP World Tour's Web site.
With this win, Roger improved his score in 2018 to 10-0 and he will compete in his fifth Rotterdam semi-final, 17 years after reaching the first in 2001!
Roger Federer has revealed how he would play against himself, which could give a new approach to players who are looking to emulate or come up against him.
People Keep Walking Into Glass at Apple Park
In 2012, an 83-year-old woman sued Apple after walking into a see-through door at an Apple Store and breaking her nose . In addition, another source within Apple told Time that there actually are markings on some of the glass panes.
Federer, who entered Thursday's match with a flawless 13-0 record against Kohlschreiber, had to fight off two set points in the first-set tie-break between the two opponents. I think and I'd like to see from any opponent against any top guy, just try stuff out there. "It was quite the relief at the end".
Here are some facts about Federer and his ranking. Coming off a win at the Australian Open, the 36-year-old is looking to reclaim the No. 1 ATP ranking at the event.
"I was preparing for the second set, being down one set", he said. "This maybe means the most to me in my career".
"The most important thing is to be healthy, I would have had great regrets if I had not come here this week". Sometimes you're trying to get there because you're playing so well, other times you try to fight to get back and you wrestle it back from someone who deserved to be there.
South Africa's new president invokes Mandela, promises 'a new dawn'
The suspect, Ajay Gupta, is considered a fugitive after failing to turn himself in, according to police. Ramaphosa was named President of South Africa after the resignation of Jacob Zuma .
Federer cruised 6-1, 6-4, 6-4 in a 2012 clay-court Davis Cup tie in the Netherlands and he also got the job done 6-3, 7-6 (5) in the Montreal semifinals last summer.
Rublev advanced to the quarterfinals by beating fellow qualifier Damir Dzumhur of Bosnia and Herzegovina 6-4, 7-6 (4) on Thursday. Rublev will now face Dimitrov while Medvedev meets Andreas Seppi.
Meanwhile, in the bottom half of the draw, last year's runner-up David Goffin progressed to the last four without having to hit a ball after the withdrawal through illness of Tomas Berdych.
US, Turkey agree to normalise relations - Turkish FM
The U.S. had warned Turkey against such move which it said could lead to confrontation between Turkish and U.S. troops. The United States has no troops on the ground in Afrin, where the Turkish offensive has so far taken place.