Thailand's Chapchai Nirat overcame final round nerves to win the TCL Classic at the Yalong Bay Golf Club by three shots over Argentina's Rafael Echenique after carding a final-round 71.

The 23-year-old, who had dominated the tournament from the start after shooting an opening course-record 11-under-par 61, headed into the final day with a five-shot lead over England's Miles Tunnicliff.

But Echenique steadily reduced the lead during the final round on his way to a four under par 68 before Nirat landed the £85,000 first prize with a 22-under-par 266 following a conservative final day performance.

"There was a lot of pressure today, but I talked to my caddie and the plan was to just keep playing at the same level as the first three days," said Nirat, who gains a card on the European Tour for the next two years after winning the Asian Tour co-sanctioned event.

"I was feeling serious because on the back nine Rafael was getting close, so I didn't want to make mistakes. At the finish I was very happy."

Thailand's Prayad Marksaeng finished two shots adrift of Echenique, with England's James Heath and Australia's Simon Nash at 16 under.

Lee Westwood finished tied for ninth on 14 under after carding a final-round 70, while compatriots Nick Dougherty, Oliver Fisher and Tunnicliff finished a further shot back.

Ireland's Paul McGinley produced a final round 68 to leap to nine under par.