Japan Open: Ruud stunned by Giron in second round

American qualifier Marcos Giron defeated Norwegian Casper Ruud, the second seed, 6-3, 6-4 to move into the quarter-finals of the Japan Open at the Ariake Colosseum in Tokyo on Wednesday.

Giron, ranked No 79, will face Canadian Felix Auger-Aliassime, the No 8 seed, next.

The American won against Japanese Yoshihito Nishioka (7-6 (14), 4-6, 6-1) in the previous round of the Tokyo Open.

In the first round of the Tokyo Open, Ruud, ranked No 8, won against Japanese wildcard Yosuke Watanuki (7-6 (6), 6-3).

Tokyo ATP500, other second-round results (Ariake Colosseum, hard, USD 2.013.940, most recent results first):

• Zhizhen Zhang vs. Aslan Karatsev
• Taylor Fritz vs. Shintaro Mochizuki
• Alex De Minaur vs. Diego Schwartzman
• Cristian Garin vs. Alexei Popyrin
• Ben Shelton vs. Jordan Thompson
• Tommy Paul (5) beat Mackenzie McDonald: 6-4, 6-2
• Felix Auger-Aliassime beat Sebastian Ofner: 6-4, 6-1