The Australian signed for a round of 64 to get to 19 under par at Dom Pedro Victoria Golf Course, ahead of England's Tom Lewis, whose round of 61 was his lowest ever on the European Tour and came just one day after his countryman Oliver Fisher entered the history books with his round of 59.


Herbert has been relying on invites this season, but the 22 year old has a great chance to earn his card for 2019, coming into this week in 103rd place in the Race to Dubai Rankings presented by Rolex after four top tens. He’s now in a good position to become the first wire-to-wire winner on Tour since England's Matt Wallace at last season’s Open de Portugal at Morgado Golf Resort.


Lewis, the 2011 Portugal Masters champion, was one shot over par at the end of the first round but has made 18 birdies with no dropped shots since then. He is enjoying a period of good form after claiming the Bridgestone Challenge title on the Challenge Tour two weeks ago.


Swede Marcus Kinhult and England's Eddie Pepperell are two shots behind Lewis and four off the lead at 15 under par, a shot clear of Finn Mikko Korhonen, Renato Paratore of Italy and Fisher - who followed up the first ever round of 59 on the European Tour on Friday with a 69.


Spain’s Pep Angles and Li Haotong of China are at 13 under par, with a group of five players - including two former winners of this event in Ireland’s Shane Lowry and Andy Sullivan of England - one shot further back in a tie for tenth place.


After 81 players made the cut, a second cut at the end of round three has reduced the field to 72 players for Sunday’s final round.