Chilean Mark Tullo holds a one-shot lead heading into the final day of the Madeira Islands Open in Portugal. Tullo carded a four-under 68 on Saturday at the European Tour event, enough to give him the outright lead. American Peter Uihlein and Scotsman Craig Lee are a shot adrift of Tullo in a tie for second, while Swede Jarmo Sandelin and Dane Morten Orum Madsen are locked level for fourth, four shots off the pace. Tullo who is playing in just his seventh European Tour event started his round with a birdie and he made up further ground on holes 11 and 12. A bogey immediately followed but Tullo recovered well, finishing with two more birdies as he moved to an overall score of 12 under. Uihlein and Lee are breathing down his neck, with the former shooting three birdies on the back nine to finish with a 69. Lee hit four birdies and two bogeys in a 70 as both players remained within a shot of the tournament leader. Sandelin and Madsen will need to perform to their best on Sunday to have a chance of winning, but the latter showed promising signs with three birdies and a back nine in his round of 67. American Daniel Im and Portugal&aposs Jose-Filipe Lima are locked at six under, in a tie for sixth, with their chances of victory slim to none, while a further group of four English duo Chris Paisley and Richard Bland, Sweden&aposs Rikard Karlberg and Finland&aposs Roope Kakko are tied for eighth at five under. Defending champion Ricardo Santos, of Portugal, hit a three-under 69 and is in a tie for 37th.