MELBOURNE: Garbine Muguruza stormed back into the Grand Slam big time with a 7-5 6-3 win over Russian Anastasia Pavlyuchenkova to reach her first Australian Open semi-final on Wednesday. The twice Grand Slam champion will meet former finalist Simona Halep on Thursday for a place in Saturday's final after producing her most complete performance at Melbourne Park this year on a sunbathed Rod Laver Arena. In a match of grunting baseline pounders, Spaniard Muguruza broke the 30th seeded Russian twice in the second set and charged to the finish in a hailstorm of winners. Pavlyuchenkova saved a match point with a thumping backhand but was powerless to deal with the second as Muguruza sealed the match with a deft drop-volley.