Celtic are currently in the process of deciding whether to appoint Neil Lennon for the long-term or not.
Lennon has taken over at Celtic from Brendan Rodgers, and he has kept the Bhoys on course to lift their third domestic treble in succession.
Celtic beat Aberdeen 3-0 at Hampden Park in the Scottish Cup at the weekend.
And Tierney was delighted to get the win for Celtic boss Lennon. He said: “I’m delighted for Lenny. He’s a great manager to win under.
“He makes you feel so special, he gives you a lot of confidence and makes you play with a smile on your face. I think you can see that in the boys.”
Lennon’s future at Celtic is currently up in the air, as he is only under contract until the end of the season.
Celtic are still looking to appoint a new permanent boss next season, but it is unclear whether they will stick with Lennon or look to appoint from elsewhere.
If Celtic do lift the Scottish Cup then Lennon’s chances of staying on at Parkhead will surely be greatly increased though.
The Bhoys are next in action at the weekend, when they take on Hibernian at Easter Road.