Defending champion Jasmine Paolini overcame a rain delay on match point to advance to the last 16 of the Dubai Duty Free Tennis Championships with a 6-2, 7-5 win over Germany's Eva Lys.
Elsewhere, in a clash of former finalists, No. 2 seed Iga Swiatek raced past Victoria Azarenka 6-0, 6-2 to reach the next round.
Fifth seed Jessica Pegula also advanced with a 6-0, 6-4 victory against Liudmila Samsonova, while No. 9 seed Paula Badosa defeated Elise Mertens 6-2, 6-1.
In other matches, sixth seed Elena Rybakina eased past qualifier Moyuka Uchijima 6-3, 6-2, No. 11 seed Diana Shnaider lost to Linda Noskova 6-7, 6-4, 3-6, and Dayana Yastremska defeated Anastasia Potapova 6-2, 6-3.
FIFA President Gianni Infantino proposed an outside review of how the governing body makes major decisions on Monday, acknowledging in a letter to members that its handling of a now-abandoned investment plan had caused concern.
Captain Marquinhos has snatched the winner as champions Paris St Germain won 2-1 at troubled Olympique de Marseille in Ligue 1 on Sunday, condemning the hosts to a fifth successive loss and a spot in the relegation zone.
Anders Dreyer has scored his 10th and 11th goals on either side of halftime and visiting San Diego FC earned a 2-2 draw against Lionel Messi and defending MLS Cup champions Inter Miami on Sunday night.
Manchester City head into the first international break three points clear at the top of the Premier League after Antoine Semenyo's double sealed an enthralling 5-3 home win over Sunderland, for whom Brian Brobbey grabbed a hat-trick, on Sunday.