Watch: Michaella Krajicek receives an on-court marriage proposal

Michaella Krajicek was asked a special question after her first-round win on Monday. (Fiona Goodall/AFP/Getty)

No. 207 Michaella Krajicek earned a hard-fought 6-3, 4-6, 6-1 upset win over No. 62 Jana Cepelova at the Topshelf Open on Monday. And then the real surprise came. Krajicek's boyfriend, ATP doubles player Martin Emmrich, came out on court, dropped to one knee, and proposed.

"It was a huge surprise," Krajicek said. "I mean, we spoke about marriage a couple of times before, but I didn't expect it now. It's very special. I'm really happy and I feel so lucky that he did it like this. We met here one year ago and I think it's such a very special place to do it.

"The first 10 or 15 seconds when he came on the court I thought, 'Okay, it's nice to see him, but this is strange.' But then I saw he had tears in his eyes, and I was like, 'Oh wow,' and I realized what was going to happen! I was so focused on him the whole time I didn't hear anything he was saying!

"I just knew I was for sure going to say yes. That was all I knew in that moment."

Watch the emotional moment below: