Novak Djokovic secured his place in the semi-finals of the Monte Carlo Masters with victory over Holland's Robin Haase in a topsy-turvy match.
The world number one exchanged several breaks of serve with Haase, but his experience came through as he won 6-4 6-2 in one hour and 17 minutes.
Djokovic had battled past Alexander Dolgopolov on Thursday in an emotional match played shortly after learning of his grandfather's death.
The Serbian looked more like his usual self in the early stages against Haase, with two breaks of serve giving him a 4-1 lead in the opening set.
His Dutch opponent responded with two breaks of his own to pull the scores level, but another break in game 10 handed Djokovic the advantage.
The second set followed a similar pattern as Djokovic raced into a 4-0 lead, only for Haase to pull a break back in game five when the top seed put a forehand wide.
The pair traded further breaks in games six and seven, but Djokovic wrapped up the set in the eighth when Haase fired into the net.
The top seed will now face Tomas Berdych in the last four after the Czech ended Andy Murray's challenge following a lengthy tussle.
The third-seeded Scot took the first set on a tie-break but was unable to build on his lead as his Czech opponent hit back for a 6-7 (4/7) 6-2 6-3 victory after nearly three hours.
