The Novak Djokovic serve continued to hit all of its targets on a busy day for the Serb on Wednesday, as he defeated Spain’s Alejandro Davidovich Fokina in the third round in singles, 6-3, 6-1, and then partnered up with countrywoman Nina Stojanovic to beat Brazil’s Marcelo Melo and Luisa Stefani in the first round of mixed doubles, 6-3, 6-4.

Through three rounds of singles so far, Djokovic has held 25 of 26 service games. The only time he’s been broken came against Jan-Lennard Struff in the second round, when he was already up a set and a break at 6-4, 2-0—after dropping serve to make it 6-4, 2-1, he ended up breaking the German right back anyway for 6-4, 3-1, cruising from there.

Djokovic then held all six of his service games in his first mixed doubles match, and easily, too—he held three of them at love and won 24 of 29 points on serve overall.

So across both disciplines in Tokyo, that’s 31 holds in 32 service games.

On Thursday he’ll play both of his quarterfinal matches on Centre Court at Ariake Tennis Park, taking on Japan’s Kei Nishikori in singles before partnering with Stojanovic to face the German mixed doubles pair of Kevin Krawietz and Laura Siegemund.