Daniil Medvedev backed close friend Andrey Rublev to beat bitter rival Stefanos Tsitsipas “many, many times” after the Greek appeared to disparage the Russian for having only a “few tools” to defeat him at the 2022 ATP Tour Finals.Medvedev, who beat Rublev 6-2, 6-2 in the Dubai final on Saturday, criticised Tsitsipas for making such...