Scott McDonald fears countryman Tom Rogic does not provide Celtic with enough of a goal threat when they play in the Champions League.
Rogic has netted seven times domestically for the Hoops this season and did score the first goal in their crucial 5-2 victory over Hapoel Be’er Sheva to help Brendan Rodgers’ side reach the Champions League group stages for the first time in three years.
However, with the Parkhead men drawing blanks in three of their five group games, McDonald believes, at the highest level, Celtic require a different option to the 23-year-old attacking midfielder going forward.
The former Celtic marksman said: “You’re looking for almost a second striker, more a second striker than an attacking midfielder, someone who is more of a goal threat.
“In the league, Tom Rogic has been doing phenomenally well, he’s been scoring lots of goals, but at the [Champions League] level he’s failed to shine a little bit more, in terms of scoring goals or creating.
“He’s still young and he’s still learning and, as a fellow Aussie, I’m going to protect him all the way – and two years ago you would never have thought in a million years he would be anywhere near this team.
“He’s still progressing and I know Brendan has got a lot of time for him and wants to work with him, and he’s here for the foreseeable future.”
He added to BBC Scotland: “But another option, a different type of option, would be good for Celtic.”