Sako left Wolverhampton Wanderers for Crystal Palace three years ago.
Wolves secured promotion without having to kick a ball, as Fulham surrendered a late equaliser against Brentford - 22 hours before Nuno Espirito Santo's side were due to face Birmingham City.
Afterwards, Sako - who was part of the Wolves side which fell into and bounced straight back out of League One five years ago - posted the following message on the social networking site.
And with the 29-year-old out of contract at Palace this summer, a number of Wolves fans are urging him to return next season.
Here's what they're saying on Twitter...
Hope recovering well then come home— gary wylde (@gazrw) 15 April 2018
Come back Sako— i like meme (@michaeljaydude) 15 April 2018
Any chance you wanna come back?— Lucas (@lucasbradl3y) 14 April 2018
Get back to the pack Sako would offer something different ...— Lincolnshire Wolf (@nickprobert4) 14 April 2018
Wolves are so much bigger than #cpfc
Always welcome back Bakary!— Sensei 先生 (@Mr94Official) 14 April 2018
Come backkkkk— Aden lowe (@aden_lowe) 14 April 2018
Yes big man? Free agent next season? Come home— Mathias Lewis (@CoMathias90) 15 April 2018
Sako was starting to hit form before an ankle injury struck in January, and the Mali international may not play again for Crystal Palace, whose manager Roy Hodgson has declared him a doubt for the start of the new campaign.
Would Sako be a good addition for Wolves?