The 2018 ATP Finals (also known as the 2018 Nitto ATP Finals for sponsorship reasons) was a men's tennis tournament that took place at the O2 Arena in London, United Kingdom, from 11 to 18 November 2018. It was the season-ending event for the highest-ranked singles players and doubles teams on the 2018 ATP World Tour.

Alexander Zverev is a German professional tennis player. He has been ranked by the ATP as high as world No. 2. Zverev's singles career highlights include a gold medal at the 2020 Tokyo Olympics, and titles at the 2018 and the 2021 ATP Finals. He has won 21 ATP Tour titles in singles and two in doubles, and contested a major final at the 2020 US Open.