By Frank McAvennie

8th Jul, 2021 | 4:00pm

McAvennie issues burnout warning to Celtic and Rangers after pre-season blunder

Frank McAvennie claims Celtic and Rangers could suffer from burnout because of their pre-season schedule.

The former Hoops hitman, speaking exclusively to Football Insider, insists both clubs haven’t had enough time off.

Rangers and Celtic have both played their first pre-season fixtures after a short holiday.

Rangers beat Partick Thistle 1-0 while Ange Postecoglou’s first game as Hoops boss ended in a 3-1 win over Sheffield Wednesday.

Both clubs face a packed schedule before the Premiership season gets underway.

Some players are yet to return to their club due to their involvement in Euro 2020.

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McAvennie insists the Old Firm sides should have had more time off before returning to action.

“The biggest problem for me, for Celtic and Rangers, is the time off,” McAvennie told Football Insider correspondent Ben Wild.

“They are back far too early. They got two weeks holiday then they are back in.

“Especially for Celtic with the Champions League qualifiers back. I feel for both of them.

“They need some time off, especially how busy last season was. Match fitness could be a big issue next season.

“Celtic barely have a squad as well. It’s not good for either side.”

Celtic face FC Midtjylland in two weeks as their preliminary Champions League campaign gets underway.

A trip to Tynecastle awaits on the first day of the Premiership season but Postecoglou will have already taken charge of at least two competitive fixtures by then.

In other news, ex-manager backs Celtic to re-sign ‘amazing’ man after source’s telling update.