After toiling to a straight sets loss to Lucia Bronzetti, an emotional Halep announced her decision to step away from tennis.
Halep won the French Open in 2018 and added the Wimbledon crown to her Grand Slam haul a year later.
But after a successful appeal to the Court of Arbitration for Sport, Halep returned to the court last March.
Emotional Wimbledon champion retires on court after being thrashed in final match months after returning from drug ban FORMER World No.
Halep played her last match at the Transylvania Open in her native Romania on Tuesday.
