However, we must also give the Japanese man credit for getting back towards his best level - he's held 88.2% and broken 25.9% in 16 indoor matches in the last three months (combined 114.1%) and these numbers are similar to Federer's data over the same time period.
"The Challenger Tour I think it's really important".
Federer is aiming for a 100th career ATP title in London and going by the early judgements, his prime thorn will be Djokovic. "I've enjoyed the most success here, so I should be the last one talking about moving it anywhere, but at the same time I feel that this event should be travelling more".
"I think I've taken the towel once or twice this year, once in Acapulco and once in Washington when it was like 120 degrees and when it was 150 per cent humidity". This year they clinched Wimbledon and US Open titles. He became the oldest World Number one in the 45-year history of the ATP Rankings.
Nadal this week pulled out of the tournament in London - guaranteeing Djokovic will end the season as the world number one. I won 20-plus matches in a row and had the most wonderful last five months of the year.
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"I'm very happy I won a Slam and very happy I played as well as I did throughout the season". He went on to reach the semifinals at the U.S. Open, where he lost to Novak Djokovic.
Tennis has been marred by players haranguing ball boys and girls for towels in recent years and a trial at the Next Gen Finals in Milan last week saw players having to retrieve a towel from a rack in the corner of the court in a bid to limit its use.
Zverev, 21, has been touted about as one of the leaders of the new generation and has won three Masters titles in his short career but he has flattered to deceive at the Grand Slams.
"And if he did, I knew there was a good chance I would play him in the group or the first match, especially if Rafa didn't play". Djokovic is looking to equal Federer with his sixth title at the O2, while the Swiss has another big target in view, his 100th career title. I have to really compete and I know there are no easy matches. "What else does a person need to be happy?' Tennis is my passion and I'll play as long as possible because I truly love it".
It has taken Federer longer to hit cruising speed in the second half of 2018, perhaps in part because of a hand injury.