John Hartson believes it's Celtic's Premiership title to lose going into Sunday's Glasgow derby.
And he reckons Kyogo could have some influence off the bench.
Celtic face Rangers at Ibrox on with just three points separating the sides in the Premiership title race.
Both clubs are targeting trebles this season and this clash could go a long way to defining their respective seasons.
And Hartson thinks if Ange Postecoglou 's side avoid defeat in Govan, it's their title to throw away.
"It's their title to lose, absolutely", Hartson told Go Radio.
"If Celtic win then the club's in a fantastic place to go and attack the last six games.
"Rangers can't afford to be six points behind, potentially seven with the goal difference with seven games to go.
"Celtic have got one hand on the title if they win on Sunday."
Hartson was also asked about the chances of star man Kyogo making his long-awaited return to the Celtic side to face Giovanni van Bronckhorst's men.
He said: "I know he came back for the League Cup final and scored two goals. He's huge for the team.
"But he can't be 100% fit having not played any games so I think that Giakoumakis starts on the back of his form. Two hat-tricks in his last three or four games. He's in great form.
"So I think Giakoumakis starts and I think Kyogo will start on the bench.
"A great player to bring on. The same with Rogic, if he is ready and available I think he starts."
