Defending champions Iga Swiatek and Carlos Alcaraz powered into the second round of Roland Garros but fourth seed Taylor Fritz and four-time Grand Slam winner Naomi Osaka were unable to avoid the trapdoor on Monday.

Swiatek continued her bid to become the first woman to win four straight Roland Garros crowns in the professional era since 1968, thrashing Rebecca Sramkova of Slovakia 6-3 6-3 for her 22nd successive Roland Garros match win.

Spaniard Alcaraz enjoyed a similarly trouble-free first-round match, easing past Italian qualifier Giulio Zeppieri 6-3 6-4 6-2 before saying he was surprised to find his groove so soon in the tournament.