NEW YORK—Rafael Nadal said he needed to “fix things” and was unsure about his return to competitive tennis after his bid for a men’s record-extending 23rd Grand Slam title ended in the fourth round of the U.S. Open on Monday.
American Frances Tiafoe, who had lost both previous meetings against the 36-year-old left-hander, stunned the second seed in front of a packed Arthur Ashe Stadium.