Acapulco, Guerrero, Mexico, 1 March 2017 | tennis.com.au

Bernard Tomic has retired from his first round match at the ATP Acapulco tournament due to heat exhaustion.

Tomic lost the first set in a tiebreak to Donald Young before withdrawing.

The Australian reached the final in Acapulco last year, falling in three sets to Dominic Thiem in the decider.

Tomic could have faced a second-round match with compatriot Nick Kyrgios, the sixth seed who opens against Dudi Sela.

Instead, a Kyrgios victory will set up a last-16 clash with Young, who’s shown impressive form of late in reaching┬áthe semifinals at his last two tournaments in Delray Beach and Memphis.