There are many engaging matchups on Day 5 of the US Open. By the tip of the day, the second spherical will likely be full, and several other massive names—in addition to just a few darkish horses—will likely be seeking to make their transfer. Right here’s what we’ll be watching:

[1] Jannik Sinner (ITA) vs Alexei Popyrin (AUS)
Alexei Popyrin has made a reputation for himself as an enormous killer—he’s gained two of his final three matches in opposition to Prime-5 gamers and 12 of his final 20 in opposition to the Prime-10. Let’s not neglect: it was Popyrin who shocked Novak Djokovic within the third spherical right here at Ashe final 12 months.
However now he faces Jannik Sinner, who’s reducing by way of the draw like a bullet prepare. The World No.1 owns a 22-match hard-court successful streak on the majors and misplaced simply 4 video games in his first-round win over Vit Kopriva. Can Popyrin sluggish him down in New York?
[23] Naomi Osaka (JPN) vs Hailey Baptiste (USA)
Naomi Osaka appears to be like increasingly more like her previous self, and her hard-court pedigree makes her harmful. She holds a 2-0 file in opposition to Hailey Baptiste, although each conferences have stretched to 3 units. Baptiste, now at a career-high No.47, has had a breakthrough season highlighted by a Roland-Garros run, and she or he has the instruments to push Osaka once more. The query: will Osaka’s renewed confidence shine by way of if the match goes the space?
Snowbirds on Court docket 7
Canadian followers can have a lot to cheer for on Thursday in New York. Denis Shapovalov takes on France’s Valentin Royer, whereas Gabriel Diallo battles Jaume Munar of Spain. Munar has made massive strides on onerous courts this 12 months, however Diallo’s booming serve and aggressive recreation might tilt the steadiness in his favor.
Felix in Focus
Felix Auger-Aliassime joins the Canadian cost on Court docket 5, the place he’ll meet Roman Safiullin. Safiullin, who took out Gael Monfils in spherical one, is at all times harmful, however Auger-Aliassime is much more so when he’s firing on all cylinders.