The Celtic legend is adamant that Forster is an improvement on the long-serving Hoops man.
Fraser Forster, Craig Gordon and Scott Bain are the three main goalkeepers at Celtic.
Christopher Jullien played well for Celtic against Rangers at Ibrox last weekend, says Fraser Forster.
Celtic brought in Fraser Forster on loan from Southampton over the summer, with the 31-year-old making a return to Parkhead.
Celtic ran out 2-0 winners over Rangers at Ibrox last weekend, with Neil Lennon's side striking the first blow in the title race.
Fraser Forster and Mohamed Elyounoussi joined Celtic from Southampton on loan in the summer transfer window.
Fraser Forster has raved about Celtic winger James Forrest.
Fraser Forster re-joined Celtic on loan last week.
Scott Brown is one of Celtic's most decorated players of all time.
Celtic boss Neil Lennon has a big week ahead of him with a Europa League tie on Thursday then the Old Firm at the weekend.
Liverpool have been linked with making a move for Jadon Sancho, who caught the eye for England in midweek.
Giovani Lo Celso will have to wait for his first Tottenham Hotspur start as he is set to spend some time on the sidelines.
Tottenham Hotspur appear to have Yago Santiago back with the club.
Rangers have already agreed to sign Northern Ireland midfielder Charlie Lindsay from Glentoran.
Tottenham Hotspur striker Troy Parrott is regarded as the best up and coming talent at the club right now.
Liverpool legend Steven Gerrard took some flak during Vincent Kompany testimonial, despite not being there.
Sunderland are expected to be sold to a group of American businessmen.
Thomas Christiansen has acted with class since his departure from Leeds United.
Sunderland have signed Laurens De Bock on loan from Marcelo Bielsa's Leeds United side for the season.
Liam Burt left Ibrox club Glasgow Rangers and joined Celtic in the summer transfer window.
Chelsea are interested in signing Jack Butland, so here are three Premier League goalkeepers Stoke could replace him with.
Southampton would have an incredible team if they had held onto their best players.
What would a combined XI consisting of the current Southampton side and the one that Gordon Strachan guided to eighth in 2003 look like?