The Glasgow Rangers forward rejected a new deal at Ibrox, but has sent a positive message to supporters.
Liverpool completed a move for the Southampton forward early in the transfer window.
Jamaal Lascelles is currently the leading candidate to be handed Newcastle United's captain's armband.
The Hoops were stunned by Lincoln Red Imps, and Tierney has discussed how the disappointment ranks in comparison with last term's defeat to Glasgow Rangers.
Leeds United fans turned up in their droves to support the club in Dublin.
Newcastle United won 6-0 against Bohemians yesterday.
Brendan Rodgers has made just one signing since taking charge at Celtic.
Both players made late appearances during the pre-season friendly with Wigan on Saturday, with Pereira finding the net in a 2-0 win.
Gerard Deulofeu featured in Everton’s win against FK Jablonec in a pre-season friendly game on Saturday.
Chelsea have signed N’Golo Kante from Leicester City.