Eyebrows have been raised at players assessments of the ATP Finals courts.
Roger Federer claimed the court is slower than other indoor hard court events, while Alexander Zverev branded it as one of the quicker courts on the ATP Tour.
But the German has gone on to explain the weird nature of the court can lead to different accounts, while joking Federers desire for as fast a court as possible is clouding his judgement.
After defeating Marin Cilic 7-6 (7-5) 7-6 (7-1) on Monday afternoon, he said on court: Its very fast. Definitely one of the quicker courts that we have on tour.
Its different from Paris, also in Paris it was fast but low bounce, here its kind of quick and high bounce. Its a mixture of both. All games fit here but its tough to find your rhythm on it.
Zverevs account appeared somewhat at odds with Federers description of the court speed after his defeat to Kei Nishikori.
I think it plays different or its definitely slower than I think the last three tournaments that Ive played, the world No. 3 said.
So I think everybodys making a minor adjustment, you know. So am I.
When asked why he thought Federers account differed from his, Zverev responded: The court is very weird. When you hit it flat and hard like Cilic does, the court is very fast.
When you hit it with more topspin, the court takes it away and it bounces up. Its more different than other tournaments. For me, it is pretty quick.
After a brief pause and with a wry smile, he then joked: Also Roger wants to play on the fastest court possible, I guess.
Kevin Anderson agreed with Federers assessment that the court is slower than in Paris, however, he, like Zverev, alluded to a higher bounce.
The South African said after beating Dominic Thiem: Obviously its indoor tennis, so its going to be on the quicker side. But the courts playing great.
You know, it feels maybe a little bit slower than Paris, but all in all, you know, I feel pretty well-adjusted to conditions now. Its definitely taking the serve nicely.
Its still bounces up, though, as well, so thats always a good sign for me.
Cilic, meanwhile, belives there is little difference in how the court plays this year from 2017.
The Croat said: I dont know. I felt also quite good when I was practising on the court. I think this kind of court is also, when you get a few matches on it, when it gets used, its becoming a bit quicker. So, I think its just normal.
I dont think it is much different from last year, it is more or less the same. It can vary from the air conditioning inside the stadium. Generally, it plays quite the same.