Stan Wawrinka downs Casper Ruud to set Brandon Nakashima in next round of Swiss Indoors Basel

Competing at the Swiss Indoors Basel for the 15th time, Stan Wawrinka used a crisp and efficient performance to upset second seed Casper Ruud on Tuesday.

Wawrinka converted on each of his two break points -- one late in each set -- and saved all three against him to close out the victory 6-4, 6-4 in one hour and 18 minutes.

Ruud committed just four unforced errors in the match, but one-handed Wawrinka the strong break in the second set as the Norwegian offered to serve with an untimely loose game.

Wawrinka, who won 93 per cent (26/28) of his first-serve points and smashed 28 winners, served out the triumph with ease to advance to the Basel second round for the seventh time.

"It's super special. A lot of emotion being back here in Basel with the Swiss fans," Wawrinka said in a post-match as quoted by ATP.com.

"It's always been amazing for me to play here [but] it's always been difficult because I am always nervous when I enter this court. I always want to show my best. It took me a little bit of time to adapt to the court but the level was great and I'm really happy with that. This is one of the main reasons why I keep on playing," added Wawrinka, who entered the event with a protected ranking.

"I'm getting old, that's for sure. I had to fight the last two years with the injury, and surgery. Coming back was not easy. I was struggling really to get back in shape physically and tennis-wise. So to be able to produce that tonight here in Switzerland is of course something really special and hopefully, I can keep playing well," he added.

Wawrinka will next face American Brandon Nakashima, who defeated David Goffin 2-6, 7-6(4), 6-4 on Monday.

( With inputs from ANI )