Puerto Rican Monica Puig lost to the American Danielle Collins on Monday 3-6, 6-4, 6-2, failing in her attempt to reach the quarterfinal of the Miami Open.
Puig seemed to be playing hesitantly when the game started, but talked to her coach, Juan "Nacho" Todero, and subsequently won the next four games to take the set.
But the Puerto Rican went on to lose the second set 6-4 and the third set 6-2.
Puig had medical assistance on her right shoulder, which was giving her problems and reduced her ability to play with her comfortable right-handed swing.
In the quarterfinals, No.93 seed Collins will face eighth-seeded compatriot Venus Williams, who on Monday won against the 2017 Miami Open Champion, Britain's Johanna Konta, 5-7, 6-1, 6-2.