Matteo Manassero became the first teenager to win three European Tour titles after prevailing in a playoff at the Singapore Open on Sunday, while Adam Scott finished in a tie for fifth place. The 19-year-old pipped South Africa&aposs Louis Oosthuizen with an eagle for victory on the third extra hole at the Sentosa Golf Club. Earlier, Oosthuizen carded a final-round four-under 67 to join Manassero (69) at the top of the leaderboard with a total of 13-under 271. The players returned to the 18th tee, which they both birdied in regulation to force the tie-breaker, and again birdied on the first extra hole. Oosthuizen could have clinched the title with a putt for birdie on the second playoff hole, but it lipped out as poor light threatened to delay proceedings until the following day. But the Italian needed only one more hole to secure the title, with his short putt for eagle successful after Oosthuizen missed from long range. Northern Irishman Rory McIlroy stormed home with an impressive 65 to finish in third place at 10-under, one stroke ahead of Denmark&aposs Thomas Bjorn (68). Australian Scott (70) and Italy&aposs Francesco Molinari (68) were five shots off the pace in equal fifth, followed by Thai Chapchai Nirat (69), Dane Anders Hansen (68) and Englishman Chris Wood (72) at seven-under. Richard Green (69) was the next best Australian in a tie for 14th at five-under, followed by Andrew Dodt in equal 24th at two-under. Earlier, Manassero claimed a two-stroke advantage after 54 holes as officials declared the tournament would go the full four rounds, rather than being cut to three. Manassero fired a scintillating 64 in the third round, which was completed on Sunday due to long delays for thunder and lightning storms on Thursday and Friday.