Wolves managed to fend off interest at the time but talks over an extension are still to get off the ground and Foot Mercato reported earlier this week that both Villa and West Brom have made the Mali international pre-contract offers.
Turkish giants Besiktas and Russian outfit Dynamo Moscow are also said to have made offers, leaving the Championship club’s chances of retaining their star man looking slim at this point.
Asked about the speculation, Jackett was diplomatic in his response, accepting that such developments are just part and parcel of the game.
“I’m sure that does happen and that’s why people have agents,” the Wolves boss said. “I’m sure any agent will be assessing the possibilities. I’d be naive if I said otherwise.
“His contract is up at the end of the season and I would think he’ll have options and will be sought after.”
Sako is Wolves’ top scorer this season, grabbing 14 goals in 38 league games to help keep the club’s promotion hopes alive with three matches remaining.
A return to the Premier League would no doubt improve their chances of holding onto his services but, whatever the season’s outcome, Jackett believes there is still a chance he will be back at Molineux next term.
“Is the door closed at Wolves? No it isn’t,” he added. “We would all love to keep him, but it’s not going to be sorted out before the end of the season.
“It’s not something I’ve spoken to him about. We’ll talk to Sako at the end of the season and discuss the situation then.”
Signed from Saint-Etienne in August 2012 for £2.2 million, Sako has racked up an impressive 37 goals in 121 total appearances for Wolves, having stuck with the club during last season’s League One campaign.
Jackett’s side sit eighth in the table at present, three points off sixth-placed Ipswich Town, who they host tomorrow in what will be a crucial encounter for both teams’ play-offs hopes.