Scrum-half Matty Smith says ending St Helens' perfect start to the season has rejuvenated Wigan Warriors.
Since beating Saints earlier this month, they have thrashed Bradford in Super League and advanced to the last eight in defence of the Challenge Cup.
Wigan were beaten in two of their first three league games this season, having also lost the World Club Challenge to Sydney Roosters.
"The Saints game gave us a lot of confidence," said 26-year-old Smith.
Talking to the BBC's Super League Show, the England international continued: "The last few weeks we have been putting better performances together - we weren't as consistent as we would have liked starting off.
"We seem to be going in the right direction now, so hopefully can carry it on."
As a former Saints player who was allowed to leave the club earlier in his career, facing them always gives Smith extra motivation to perform.
"It's massive focus, any derby game whether you are a player, fan or coach, is a massive game.
"To get two points when Saints had been playing so well - they had a great start to the year - was a great result for us," he said.
The Warriors, who extended their winning run to eight games in all competitions by crushing Championship One side Hunslet 52-8 to book a cup quarter-final tie against Castleford, face Super League leaders Leeds next on Friday.
"They have been outstanding, have had a great start to the year and are undoubtedly the form side of the competition," Smith added.
"It will be a tough game for us, but we have a lot confidence now and we go into it looking to win."