Top seed Jannik Sinner reached the quarter-finals at the Halle ATP grass event in Germany on Thursday but only after a big battle with Hungary’s Fabian Marozsan. The Italian won 6-4, 6-7 (4-7), 6-3. He pulled away in the decider, taking a 5-1 lead before losing serve and then recovering. The Australian Open champion and world number one will face Germany’s Jan-Lennard Struff or Greek Stefanos Tsitsipas on Friday. Hubert Hurkacz also made it through to the quarter-finals. The Pole, who won the German grass court tournament in 2022, beat Australian qualifier James Duckworth 7-6 (7-3), 6-4. Hurka…