Odsonne Edouard has completed a medical and is expected to sign a five-year deal as a £14m move from Celtic to Crystal Palace is finalised.
And Celtic have recruited Greece forward Giorgos Giakoumakis from Dutch side VVV-Venlo to replace French striker Edouard, 23.
Giakoumakis, who has signed a five-year deal, was top scorer in last season's Eredivisie with 26 goals.
The 26-year-old has scored once in six appearances for his country.
France Under-21 international Edouard has netted 88 goals in 179 appearances since joining Celtic from Paris St-Germain, initially on loan, in 2017.
He formalised a move to Glasgow for a club record fee in excess of £8m in 2018 and has won three Scottish Premiership titles and four domestic cups with Celtic.