Alexander Zverev is through to his fifth Major quarter-final following a 6-4, 7-6, 6-3 triumph over Dusan Lajovic in two hours and 21 minutes. The German didn't play at his best, but it was enough to topple the Serb in straight sets, firing 44 winners and 33 unforced errors to control the scoreboard and score four breaks.
Dusan earned two return games from three opportunities, giving his best to stay in contention but hitting a similar number of winners and mistakes to fall in straight sets. The Serb saved two break points in the opening game to avoid an early setback and bring it home with a backhand return winner.
He broke Alexander's serve in the next game with a return winner and wasted a game point that could have sent him 3-0 up. Instead, Zverev pulled the break back and fended off a break chance in game four to level the score at 2-2.
The German secured another break with a sharp return at 3-3 and squandered a set point on the return in game nine. Serving for the set at 5-4, Alexander landed a drop shot winner to move closer to the finish line after 43 minutes.
Alexander Zverev is through to the second consecutive Melbourne quarter-final.
There were no breaks in the second set's opening ten games, with Lajovic opening a 5-4 advantage thanks to Zverev's forehand mistake.
With no room for errors, Alexander held at 15 with a service winner and grabbed a break that sent him 6-5 in front. Ready to fight until the last point, Dusan broke back with a forehand winner to gain momentum and force a tie break.
Alexander won it 7-5 following a brilliant point and a forehand winner, forging two sets to love advantage and looking good to move forward in straight sets. Carried by this boost, Zverev barely lost a point behind the initial shot in set number three and waited for a chance on the return patiently.
Lajovic sent a forehand wide in the fourth game to get broken, with three more break points up for grabs for Zverev in game six. Dusan erased those to remain within one break deficit before Alexander sealed the deal with an ace at 5-3 for the place in the last eight against world no. 1 Novak Djokovic.