Aberdeen were trailing 2-0 to Dundee United at half-time but Thelin delivered a message to his team in the dressing room that was key to salvaging a draw.
Defeat on Sunday and the Queen’s Park cup-tie is tougher, as are games v St Johnstone, Motherwell and Ross County. Beat United, and the Reds will be licking their lips.
Winger has resurrected his Aberdeen career after a difficult period during the interim management of Neil Warnock.
McGrath opted to sign a pre-contract agreement with Hibs and will join the Dons' Premiership rivals on a four-year contract in the summer.
Latvian international centre-back was substituted in the second half of the 5-1 loss to Celtic after suffering an injury.
Aberdeen midfielder Jamie McGrath has signed a pre-contract with Premiership rivals Hibs and will join the Easter Road club in the summer.
What will the scoreline in Sunday's Premiership clash be? Find the Dons Score Predictor League password for the match here.
Centre-back gives the lowdown on why the Aberdeen defence will continue to play out from the back and also keep a high line.
The P&J spoke to John Curran's son as two of his former teams prepare to meet in the Scottish Cup.
