Alexei Popyrin upset fourth-seeded Daniil Medvedev 6-4, 2-6, 7-6 (4) in the second round of the Paris Masters on Wednesday in a tense match with many ups and downs.
The 25-year-old Australian player had lost his three previous matches against his Russian rival.
Popyrin and Medvedev combined for 86 unforced errors under the roof of the Palais Omnisports.
Medvedev trailed 4-1 in the deciding set but broke back to force a tiebreaker in which Popyrin played more aggressively. Medvedev double-faulted to give Popyrin a match point, and the Australian converted it at the net.
French wild card Arthur Rinderknech also progressed to the third round with a 7-6 (6), 7-6 (7) win over Alex Michelsen.
