Former Celt Stuart Armstrong has spoken about the high expectations faced by Celtic players on a daily and weekly basis.

Having left English Premier League side Southampton during the summer transfer window, the Scotland internationalist signed for MLS side Vancouver Whitecaps on a two-year deal.

Speaking to his new club's official website (via 67Hail Hail) Armstrong addressed his time in Glasgow's east end.

He said: “Celtic is a very tough place to be, especially when things aren’t going well. When I first moved there, I had a rough start, but then things really started to click.

“Winning the invincible treble was one of the highlights of my career—it was amazing. We qualified for the Champions League and faced the pressure of winning every single week.

“To win two trebles in a row was incredible, and then I left, and I think they won another treble. It’s an incredible club with incredible fans. The feeling you get playing at the stadium is top-notch.”

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Armstrong may have ultimately landed in Canada, but another former Celt, Chris Sutton, tipped his Celtic return as an outside bet this summer.

Prior to Brendan Rodgers securing the return of Paulo Bernardo, Sutton said: "[Armstrong] is another one who won’t be short of offers this summer. He has been a very good player for Southampton and I’d expect a queue of clubs at the top end of the Championship who would love to have him on board.

“Armstrong might be 32 years old now, but he looks after himself and has plenty left in the tank. He would be a very good signing for Celtic, perhaps one that could fill the void left by Aaron Mooy last year. I’ve said before that we shouldn’t assume Matt O’Riley is going, but Celtic will still need another attacking midfielder."

O'Riley, of course, did leave Celtic – and Bernardo likewise returned. Rodgers further strengthened the Hoops midfield with the addition of Arne Engels.