Tuesday will be basically a crucial day for Roger Federer and Dominic Thiem, who will face each other in the night session at the ATP Finals in London. Both of them lost their opening match respectively to Kei Nishikori and Kevin Anderson in straight sets.
The Austrian leads the head to head meetings 2-1 having won at 2016 Rome and Halle when Federer was not doing well due to a back injury. The Swiss only defeated Thiem at the 2016 Brisbane International semifinals. In the day session, the Day 1 winner Kevin Anderson and Kei Nishikori will face off.
The Japanese leads the head to head 5-3, he won the most recent match at the Paris Masters third round. This year Anderson won at the Vienna Open and US Open, he is making his first appearance ever in the year-end event. Analyzing his win over Dominic Thiem on Sunday, Anderson said: 'I think it was important going out there and getting off to a good start.
I definitely felt a little bit nervous. But I was able to settle very quickly and find a really good rhythm, taking care of my serve games nicely, created quite a few opportunities on his serve. He wasn't serving at, you know, well, a very high first-serve percentage.
I felt I was getting into quite a few points. The second set could have been anybody's set. He started serving well. I was taking care of my serve games. When it's 12-10 in the tiebreak, it really could have gone either way.
I think overall just getting off to a good start helped me a lot today.' ALSO READ: Rafael Nadal: Worse players than David Ferrer won a Grand Slam title