Magnus Carlsen had accused Hans Niemann of cheating after the American beat him at the 2022 Sinquefield Cup.
India are now certain to win the women's team trophy despite not fielding a wrestler in the 49kg weight class.
The fan from China cycled over 13,000 kilometres across six countries before reaching the Saudi capital city of Riyadh, where he met the 39-year-old Ronaldo.
Gordon arrived at St. James' Park from Everton in January 2023 and has gone on to enjoy a noteworthy stint with the Magpies in his 74 appearances, netting 15 goals
Medvedev came from behind in both sets to beat Brazil's Thiago Seyboth Wild 7-5, 7-5, while Tsitsipas battled through a tight match against Japan's Kei Nishikori to win 7-6 (8/6),