Melbourne:Rafael Nadal came through a thrilling five-setter against Andy Murray on Monday to reach the quarterfinals of the Australian Open men's singles. The Spaniard was two sets to one down before hitting back to take the decider 6-1 and now faces Chilean 10th seed Fernando Gonzalez. Nikolay Davydenko needed four sets to dispose of Tomas Berdych while in the women's, top seed Maria Sharapova beat fellow Russian Vera Zvonareva in straight sets. The Scottish flag of St Andrew was prominent in Rod Laver Arena on Monday night but could Andrew Murray pull off an upset against world number two Rafael Nadal in the fourth round of the Australian Open. The two young stars were bringing the best out of each other in their first professional meeting but it was the 15th seed who went in front thanks to a first set tiebreak and this incredible point helped him go 4-1 ahead in the second. Nadal came roaring back to take the second but Murray won the third before the Spaniard again pegged him back with the odd bit of luck aiding his cause. In the fifth set, the twice French Open champion's strength and stamina came to the fore and he won a thrilling encounter 6-7 6-4 4-6 6-3 6-1 to set up a quarter-final with Chile's 10th seed Fernando Gonzalez. His delight and relief was clear for all to see but the tennis world will be hoping this is the first of many times that this pair meet in Grand Slam tournaments. Sharapova sails through Nikolay Davydenko dropped the first set to Tomas Berdych of the Czech Republic but the third seed came back strongly to win 5-7 6-4 6-1 7-6 and he now plays Tommy Haas in the last eight. In the women's singles, Maria Sharapova was made to work in the first set of her fourth round clash with fellow Russian Vera Zvonarera. She eventually broke in the 11th game before holding to take it 7-5. The top seed surged into a 5-2 lead in the second set but, despite continuing to give her opponent the run-around, Sharapova showed signs of frailty as she neared the finish line. Sharapova was audibly feeling the strain as she struggled to put the 22nd seed away but she eventually came through 7-5 6-4 much to her and her father Yuri's relief. She now faces another Russian, Anna Chakvetadze, for a place in the semi-finals.