Results from the fifth day of the ATP Finals at London's O2 Arena on Thursday (x denotes seeding): Singles Group London 2020 Andrey Rublev (RUS x7) bt Dominic Thiem (AUT x3) bt 6-2, 7-5 Rafael Nadal (ESP x2) bt Stefanos Tsitsipas (GRE x6) 6-4, 4-6, 6-2 Doubles Group Mike Bryan Lukasz Kubot/Marcelo Melo (POL/BRA x8) bt Wesley Koolhof/Nikola Mektic (NED/CRO x5) 6-4, 6-7 (2/7), 10-8 Rajeev Ram/Joe Salisbury (USA/GBR x2) bt Kevin Krawietz/Andreas Mies (GER/GER x3) 7-6 (7/5), 6-7 (4/7), 10-4 afp