Agnieszka Radwanska has booked her place in the Qatar Open quarter-finals without dropping a set against Flavia Pennetta.
The Polish fourth seed, who secured a 6-1 6-1 triumph in Doha, got off to a strong start by breaking her opponent's serve at the first time of asking.
Pennetta struggled to create a break-point opportunity for herself and was eventually broken again before losing the first set with just one game on the board.
Radwanska went from strength to strength in the second set as she broke serve three times to seal a place in the final eight of the tournament.
The 25-year-old will go head to head with Venus Williams for a place in the semi-finals.
