![Latvia's Ernests Gulbis during his ATP Stockholm Open tennis tournament men's single final against Greece's Stefanos Tsitsipas at the Royal Tennis Hall, in Stockholm, Sweden, Sunday, Oct. 21, 2018. (Soren Andersson/TT News Latvia's Ernests Gulbis during his ATP Stockholm Open tennis tournament men's single final against Greece's Stefanos Tsitsipas at the Royal Tennis Hall, in Stockholm, Sweden, Sunday, Oct. 21, 2018. (Soren Andersson/TT News](https://c8.alamy.com/comp/2NWFD9B/latvias-ernests-gulbis-during-his-atp-stockholm-open-tennis-tournament-mens-single-final-against-greeces-stefanos-tsitsipas-at-the-royal-tennis-hall-in-stockholm-sweden-sunday-oct-21-2018-soren-anderssontt-news-agency-via-ap-2NWFD9B.jpg)
Latvia's Ernests Gulbis during his ATP Stockholm Open tennis tournament men's single final against Greece's Stefanos Tsitsipas at the Royal Tennis Hall, in Stockholm, Sweden, Sunday, Oct. 21, 2018. (Soren Andersson/TT News
![Greece's Stefanos Tsitsipas during his ATP Stockholm Open tennis tournament men's single final against Latvia's Ernests Gulbis at the Royal Tennis Hall, in Stockholm, Sweden, Sunday, Oct. 21, 2018. (Soren Andersson/TT News Greece's Stefanos Tsitsipas during his ATP Stockholm Open tennis tournament men's single final against Latvia's Ernests Gulbis at the Royal Tennis Hall, in Stockholm, Sweden, Sunday, Oct. 21, 2018. (Soren Andersson/TT News](https://c8.alamy.com/comp/2NWFDHD/greeces-stefanos-tsitsipas-during-his-atp-stockholm-open-tennis-tournament-mens-single-final-against-latvias-ernests-gulbis-at-the-royal-tennis-hall-in-stockholm-sweden-sunday-oct-21-2018-soren-anderssontt-news-agency-via-ap-2NWFDHD.jpg)
Greece's Stefanos Tsitsipas during his ATP Stockholm Open tennis tournament men's single final against Latvia's Ernests Gulbis at the Royal Tennis Hall, in Stockholm, Sweden, Sunday, Oct. 21, 2018. (Soren Andersson/TT News
![Horia Tecau (ROU) and Jean-Julien Rojer (NED) during the men's doubles semi final at the ATP Stockholm Open tennis tournament at the Royal Tennis Hall in Stockholm, Sweden, October 19 2018, Photo: Horia Tecau (ROU) and Jean-Julien Rojer (NED) during the men's doubles semi final at the ATP Stockholm Open tennis tournament at the Royal Tennis Hall in Stockholm, Sweden, October 19 2018, Photo:](https://c8.alamy.com/comp/2GJCNA6/horia-tecau-rou-and-jean-julien-rojer-ned-during-the-mens-doubles-semi-final-at-the-atp-stockholm-open-tennis-tournament-at-the-royal-tennis-hall-in-stockholm-sweden-october-19-2018-photo-claudio-bresciani-tt-code-10090-2GJCNA6.jpg)