4 burning questions ahead of the ATP Finals 2018

Will the shoulder niggle from Paris hinder Zverev's serve?

Rolex Paris Masters - Day Three

Alexander Zverev has had a relatively poor 5 months on the tour. He has won a title in this period at Washington but has suffered a slew of upsets. The German first lost against the rising star, Borna Coric in the Halle Open in the run-up to Wimbledon. During the Grand Slam, he was beaten by Ernests Gulbis in 5 sets after winning in similar margins a match before. Following the Washington Open, he was defeated by Stefanos Tsitsipas in Canada.

Zverev also lost to Robin Haase and fellow German Kohlschreiber in the Cincinnati Masters and US Open respectively. Recently he lost to qualifier Copil in the Swiss Indoors tournament. In the Paris Masters quarterfinals, he was seen holding his right shoulder and wincing in pain every time he served or hit an overhead.

Alexander Zverev did end up playing the match out before losing, but the niggle might affect his gameplay on Monday as he faces the powerful Marin Cilic.