The top-ranked American improved to 5-0 against Sebastian Baez Sunday in Madrid with his 6-2, 6-3 victory.

Elsewhere Wednesday, Tiafoe lost to Koepfer and Draper sailed past Nishioka.

Elsewhere at the Mexican Open, Rune topped Mmoh and Ruud bested Eubanks.

Aleksandar Kovacevic later celebrated his first major main-draw win on Monday in Melbourne.

The American, who was seeded No. 5, struggled physically in a first-round loss to Dutchman Botic van de Zandschulp.

Meanwhile, Ben Shelton soars into the Top 20 after reaching his first Grand Slam semifinal in New York.

After nearly exiting in the first round, the Bulgarian enjoyed a much smoother ride Thursday.

There won't be a rerun of the last weekend's friendly Bastad final between the top two seeds.

The German saved two match points to beat the eighth seed in the longest match of the tournament so far.

Until Tuesday, just 15 lucky losers had made the final eight on the 1000 stage—and none in the same draw.