Lustig’s nightmare came on top of missing a large part of last season with hip problems and, of course, he was also hampered by groin and thigh injuries.
The 28-year-old has been unable to take part in the charge of Ronny Deila’s team to the Premiership title and the League Cup.
“I won’t make the Sweden European Championship qualifiers next month, but I am aiming to be back when we start up for the new season.”
Lustig sustained the ankle problem during a Scottish Cup win over Dundee at Dens Park and admitted he had no idea his spell on the sidelines would be so lengthy.
He said: “I sprained the inside of the foot and thought that I would be out for up to two weeks.“But it turned out to be worse than feared. The ligament was stretched and it was a bruise on the bone.
“As long as you feel it, you should take it easy otherwise the risk is that you may need an operation.”Lustig missed the lifting of the League Cup and will also be absent when the championship trophy is presented on Sunday, but he admitted he’s been happy with the season from a collective point of view.
He added: “It’s been very good. Things were new for us at the beginning with a new coach and many new players, but, after a bad start, we started getting things to work.
“We won the league and a Cup and were close to wining a Treble.”