Sascha Zverev and Andreas Seppi advanced to the second round of the BNP Paribas Open following their wins on Friday.
Zverev came back from a set down to defeat veteran Ivan Dodig 3-6, 7-5, 6-3 on the hard courts of Indian Wells.
In the early stages of the second set, there was an unfortunate incident at the net, where Dodig hit himself in the head with his racquet and was forced to take medical timeout.
"I thought he twisted his ankle at the first, but then I saw him bleeding pretty close to the eye and I was like, wow, he probably hit himself with the racquet," Zverev told atpworldtour.com.
"I don't know what happened, to be quite honest. I didn't see it, but he started bleeding quite heavily then."
Dodig struggled for form after the break as Zverev rallied to victory. The German will now face 23rd seed Grigor Dimitorv in the third round.
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Meanwhile, Seppi battled back to defeat American Donald Young 4-6, 6-4 6-3 later in the day.
In other results, Michael Berrer survived a second set comeback from Juan Monaco to triumph 7-6(5), 5-7, 6-4, while Bjorn Fratangelo earned his first ever ATP victory over Teymuraz Gabashvili, winning 6-4 6-4.
Fratangelo now faces top seed Novak Djokovic in the second round.
Rafael Nadal will face Gilles Muller after the left-hander eased past Victor Estrella-Burgo 7-5, 6-3.