Vijay Singh opts against Rio Olympics

Singh has decided to focus on the PGA Tour instead of heading to Brazil, as golf returns to the Games for the first time since 1904.

The 53-year-old said the timing of the event, to be played in mid-August, meant he would skip it.

"I have to focus over here [on the PGA Tour]," Singh said, via the Golf Channel.

"I would like to play the Olympics, but the Zika virus, you know and all that crap."

Singh had previously said he was keen to play at the Olympics, but instead wants to focus on making improvements to his game.

The veteran has made a poor start to the year, missing four cuts in eight events with just one top-10 finish.

"It wasn't that difficult [a decision]," Singh said.

"I feel bad, I wanted to play and finally decided against it. It's in the middle of the Tour over here and I'm trying to figure out my game."