The Poland international's deal was due to expire in the summer but he has ended mounting speculation over his future by penning a two-year extension. "I am very happy and to be honest I am quite proud that I am part of the great ambitions of this club," Boruc said.
"I don't think [Champions League is too big an ask]. We're playing Swansea this weekend and they show playing totally different football that you can achieve a lot."
He added: "I think we are heading to this with our new manager. We are showing a lot of good work and I think the results we are getting are very good as well so, yeah, why not?
"You need to ambitious in your life to achieve your ambitions. You never know what is going to happen - it is a funny story with football. Everybody has great ambitions and you need to work hard to be in that position. I do believe that we can achieve it."
Saints look all but certain to be plying their trade in the Premier League again next season and have spoken of their big ambitions for the future - something Boruc is confident they can achieve.
Few could have predicted the clamour for Boruc to stay after what was a difficult start to life on the south coast.
In only his second game for the club, the former Celtic goalkeeper was subject of an internal investigation into allegations he swore at home fans and threw a water bottle at them.
Boruc was dropped from the side after that match with Tottenham and only returned to the starting line-up on New Year's Day, although has since established himself as number one.
"It was a bit of a roller coaster," Boruc said. "I am glad it ended this way. That was the past and I will do everything to make the club better."
- Sports & Recreation