Iga Swiatek started her French Open title defence with a straight-sets win over her good friend Kaja Juvan in the first round on her 20th birthday on Monday. The Pole, who powered to a surprise triumph last year at Roland Garros, won 6-0, 7-5 against her Slovenian opponent. 

"You never know what's going to happen and I've never been a defending champion, even in the smallest tournaments, so I didn't know what to expect," said Swiatek, who was presented with flowers on court after the match for her birthday. Swiatek will face either Sweden's Rebecca Peterson or American Shelby Rogers in the second round.