Murdo MacLeod has told The Glasgow Evening Times that Celtic need to sign at least three or four quality players in the summer transfer window.
Scottish Premiership giants Celtic have added three new faces to their current squad so far this summer.
Forward Moussa Dembele, who is 20 years of age, has joined the Bhoys after leaving English club Fulham at the end of the 2015-16 season.
Midfielder Kristoffer Ajer, who is 18 years of age, has joined up with the Celtic squad, having agreed a pre-contract with the Hoops back in February.
Paul Joseph Crossan has also moved to Celtic Park, although the 17-year-old forward is not expected to feature much for the first team next season.
Former Celtic midfielder MacLeod believes that Brendan Rodgers’s side need to sign at least three or four more quality players in the summer transfer window.
“Brendan has come in having managed at a very high level so I am sure that he was quick to see that Celtic needed to sign players,” MacLeod told The Glasgow Evening Times.
“There should be no knee-jerk reaction to the result on Tuesday night because it showed up what most people have been able to see over the past few seasons.
“Celtic need at least three or four good, quality players, players who can appreciate the demands when you are playing at a high level and trying to get into the UEFA Champions League.”
Celtic have a strong squad, but they need to sign good players in order to enhance their chances of winning the Scottish Premiership title next season.
The Hoops are in danger of not progressing to the group stage of the 2016-17 Champions League campaign.
The Glasgow giants lost the first leg of their Champions League qualifying second-round tie against Lincoln Red Imps 1-0 away from home at the Victoria Stadium in Gibraltar on Tuesday evening.