Carlos Alcaraz took a medical timeout for what he said is a lingering groin muscle issue in the second set of his 6-1, 7-6 (3) singles victory over Tallon Griekspoor at the Paris Olympics on Monday night. Alcaraz is scheduled to play doubles for Spain with Rafael Nadal on Tuesday — and the opponents happen to be the Dutch pair of Griekspoor and Wesley Koolhof. Alcaraz said he watched part of Nadal's 6-1, 6-4 loss to Novak Djokovic in singles earlier Monday, before preparing to face Griekspoor.