BARCELONA (AFP) - Rafael Nadal showed no mercy towards an emotional David Ferrer as he eased into the quarter-finals of the Barcelona Open on Thursday (April 25) with a straight-sets victory.

Ferrer is set to retire after the Madrid Open next month and made a tearful exit on what was his last appearance at this tournament.

But there was no room for sentiment for Nadal, who won 6-3, 6-3 to take one step closer to a record 12th Barcelona title.

Four of those triumphs came after beating Ferrer in the final and, at the end of this latest victory, Nadal's 37-year-old opponent saluted the crowd before placing his pink headband down on the service line.

Ferrer reached a career-high ranking of number three in the world in 2013, the same year he went closest to winning a Grand Slam too, undone by Nadal again in the French Open final.

Nadal will be gunning for his 12th success at Roland Garros next month and this was more like the sort of form expected of the world number two, who had won 30 consecutive sets in Barcelona before falling one behind to Leonardo Mayer on Wednesday.

Germany's Jan-Lennard Struff or the talented 20-year-old Greek, Stefanos Tsitsipas, now await in the last eight before a potential semi-final meeting with Dominic Thiem, whom Nadal beat in the French Open final last year.

Nadal broke Ferrer for 4-2 in the opening set and was serving for it at 5-3 when rain delayed the match for almost an hour.

The stoppage could not change the momentum, with Nadal quickly wrapping up the frame upon his return before breaking again early in the second.

Ferrer offered some brief resistance, a backhand winner restoring parity at 2-2 but Nadal raced ahead as a forehand pass and half-volley put him 5-3 in front.

He missed three match points but converted the fourth before finally embracing an emotional Ferrer at the net.