Celtic will consider signing Wolves striker Kevin Doyle as a potential replacement for Gary Hooper.
Hamburg's Latvia international Artjoms Rudvens is another forward being assessed by Celtic manager Neil Lennon, who is keen to sign another striker even if Hooper stays in Glasgow.
And Celtic want to sign a forward before Thursday's deadline for the third qualifying round of the Champions League, with the Glasgow side expected to complete an aggregate win over second-round opponents Cliftonville.
The three parties bidding for control of Hearts have until Thursday to demonstrate their proof of funding to administrator BDO.
Teenage midfielder Scott Brown, formerly of Bradford City, is joining St Johnstone on a one-year deal.
Bosnia international defender Boris Pandza is prepared to lower his wage demands in order to secure a three-year deal at Rangers.
However, Rangers' pursuit of Scotland international Kenny Miller may prove forlorn, with Vancouver Whitecaps expecting the striker to extends his contract.
Aston Villa's Scotland international defender Alan Hutton, 28, is poised to re-join Real Mallorca on a season-long loan.
Glasgow Warriors will begin their Heineken Cup campaign against Toulon in France, while Edinburgh open at home to Munster.