Reigning champion Iga Swiatek celebrated her 23rd birthday by brushing aside Marie Bouzkova to reach the French Open last 16 on Friday. Swiatek had to save a match point to avoid an upset defeat by fellow four-time Grand Slam champion Naomi Osaka in a second-round thriller, but she was never in trouble during a 6-4, 6-2 win over Czech Bouzkova. The world number one is a red-hot favourite to lift the Coupe Suzanne Lenglen for a third straight year and become only the fourth woman to win four Roland Garros titles in the Open era.