Lion-hearted Alex de Minaur has marched into the quarter-finals of the ATP 500 tournament in Acapulco, dropping just seven games in two matches.
The defending champion made short work of Austrian Sebastian Ofner in their second-round match winning 6-1 6-3, which came after he swept aside Japan's Taro Daniel in their opening match after losing just three games.
The top-ranked Australian's serve proved a deadly weapon on Wednesday night (local time), winning 90 per cent of his first-serve points, but credited his big heart for the victory.
