Na goes slow but leads

American Kevin Na is leading the field heading into the fourth day of the Players Championship at Sawgrass.

The 28-year-old was given a slow-play warning by tournament referees after taking repeated practice swings and backing off several times before playing his shots.
Despite his problems, Na ended with a birdie to card a round of 68 and sits 12-under going into the final round.
Matt Kuchar, two clear in the latter stages of his round, could be left to rue finding the water on 17. The American ended second after posting a 69, with Rickie Fowler nine under.
Na, who is looking for his second PGA Tour title, repeatedly apologised to playing partner Zach Johnson for keeping him waiting but insisted no-one was more frustrated with the speed of his golf than him.
"There's a lot going on and I know the whole world's watching," he said. "It's really frustrating for me and I'm screaming at myself to pull the trigger.
"All I can do is my best. After backing off once I almost feel like I'm cornered. It's a tough situation but I'm working on it and it's getting better.
"Hopefully it will go away by the end of the year."