My friends from Ukraine came as well."She next plays unseeded American Katie Volynets and Kostyuk's countrywoman Elina Svitolina — a recent winner at the Italian Open in Rome — faces Anna Bondar on Monday.High temperatures of 33 degrees Celsius contributed to Frenchman Arthur Gea taking an emergency bathroom break early into his first-round loss to number 13 Karen Khachanov on Court Suzanne-Lenglen.Spectators folded newspapers in half and fanned themselves to keep cool as players attempted to stay hydrated.Canadian Gabriel Diallo said the heat was the main reason he retired against Australian James Duckworth after losing the first set 6-3 and trailing 4-1 in the second."That's mainly what it was," he said "It was getting worse and worse."Number 21 Alejandro Davidovich Fokina also struggled."I am coming from Hamburg with 10C it's 22C more," the Spaniard said after beating Damir Dzumhur 6-7 (3-7), 6-3, 2-6, 7-5, 6-3. "I didn't expect that."The opening match on Chatrier saw number 11-ranked Belinda Bencic beating Sinja Kraus 6-2, 6-3 and 2024 runner-up Alexander Zverev, seeded number two, winning 6-3, 6-4, 6-2 against Benjamin Bonzi.Former US Open champion Emma Raducanu and former French Open runners-up Sloane Stephens and Sofia Kenin all went out.Number 26 Hailey Baptiste won 6-7 (7), 7-6 (6), 6-2 against 2021 champion Barbora Krejčíková