Dons boss Derek McInnes today revealed he did not move to sign Tony Watt because he wanted a striker with more pace.
The 24-year-old trained with Aberdeen at the end of last season having been released by Belgian side OH Leuven.
Although a free agent, the Scotland international could not sign for any club until the summer as he had already played for Charlton and OH Leuven that term.
Watt joined St Johnstone on a season-long deal and has scored six goals.
He scooped the Premiership Player of the Year award for August.
Watt will come up against the Dons in league action for Saints at McDiarmid Park today.
McInnes admits he considered signing Watt, but wanted someone with more speed to lead the attack. Ultimately he signed Manchester United’s James Wilson on a season-long loan.
Wilson will miss today’s clash in Perth with a tight hamstring and has only featured once as a substitute for the Reds.
Asked if a move for Watt was considered, McInnes said: “We did, but just felt Tony wasn’t quite different enough in terms of style.
“We knew Bruce Anderson was going to be one of our four strikers this season.
“I had no doubt that if Tony found the right place he could score goals. But for us we were looking for a bit more pace at the top end of the pitch.
“While Tony is not slow, we just felt James’ pace would be important to us.
“We were looking for a different type of striker and had a few bids in for strikers. We were looking for someone a bit different, with a bit more size or a bit more pace.
“We recognise Tony is a good player and I really enjoyed working with him when he was in with us.
“He is a good lad and I am pleased for Tony that he has found somewhere where he can go and play regularly and show himself.”
Old Trafford striker Wilson is one of eight players ruled out for the Dons today.
Out injured are Mark Reynolds (knee), Tommie Hoban (shoulder), Scott Wright (ankle), Greg Tansey (groin) and Frank Ross (back).
Defender Mikey Devlin is suspended. Scotland international centre-back Scott McKenna returns after six weeks sidelined with a hamstring tear.
McInnes said: “St Johnstone have started well so they obviously have a degree of confidence after a couple of results.
“We expect a tough game, but hopefully we can go and impose ourselves on them and get the job done.”