What to know

• Gael Monfils Grand Slam career ends with secondround loss to Learner TienS1
• Gael Monfils bid adieu to Grand Slam tennis with a hard-fought loss to Learner Tien in the second round of the U.S. Open on Thursday night. The 40-year-old Frenchman, who is planning to retire at the end of the year, was knocked out 6-3, 6-4, 6-3 by Tien, who...S2