Andy Murray continued his remarkable run in the Qatar Open as he battled past Alexandre Muller in three sets for a place in the semi-finals in Doha.
The Brit lost a gruelling first set in 56 minutes in the quarter-final before stepping up his level of play to triumph 4-6, 6-1, 6-2 and set up a semi-final against Czech 21-year-old Jiri Lehecka, who beat top seed Andrey Rublev in his own last-eight clash.
