"I'm so passionate about winning tournaments and being here at the home of golf tomorrow is going to be a hard one to just keep myself in check and keep producing what I have done the first three days".
"The emotions were really high all day", said Perez, who actually resides in nearby Dundee.
"Obviously I felt like I had a solid day". It wasn't easy, Matt played awesome. I was expecting some of the guys to charge, and we were fortunate it was kind of a one-on-one battle on the back nine. "You have to take it how it comes and it's a great win for me".
Perez and Southgate remained in touch, but a string of birdies saw the Englishman eke out a one stroke lead as they entered the final nine.
DeChambeau takes Napa PGA Tour event lead
Romo seemed to be headed to his usual place at the bottom of the leader board after consecutive bogeys at Nos. Tony Romo walks on the 10th fairway during the first round of the Safeway Open .
Both players took advantage of the par five fifth but Southgate then found another gear, hitting a stunning approach to four feet on the sixth and another excellent second into the next.
But a two-shot swing at the par-five 14th saw Perez join playing partner Southgate at the top once more as he tapped in his close-range birdie putt to get to 22 under, while a poor pitch shot cost Southgate a shot and the outright lead.
"I would personally like to see tougher set-ups in Europe because it will produce better, more complete, young players in the future and that can only be a good thing for the game and our Ryder Cup chances".
"I understand voicing concerns about golf course set-ups in Europe to the media at a pro-am event on benign links courses wasn't the right place to do it, or the right people to talk to about it".
Rory McIlroy is one additional again after his 66 and whereas it was bogey-free, he was like Rose within the respect that he anticipated quite extra after going by way of the primary five-holes in five-under.