Ons Jabeur revealed that she has been troubled by a long-standing knee injury all week after losing in the quarter-finals of the Mubadala Abu Dhabi Open on Friday.
The Tunisian second seed was hampered by the injury throughout her 6-3, 6-4 defeat to Brazilian sixth seed Beatriz Haddad Maia, and looked visibly upset towards the end of the match.
After such a dazzling display in her first match against Emma Raducanu on Wednesday, it was clear something was bothering Jabeur during Friday's contest, and she found herself 3-1 down after the fourth game.
With no further breaks of serve, Haddad Maia closed out the first set relatively comfortably. Jabeur then showed tremendous fight to bounce back from being broken in the first game of the second set, quickly levelling for 2-2, but her resistance all but ended when Haddad Maia broke again for a 5-4 lead to give herself the opportunity to serve for the match.