The Manchester City skipper was taken to hospital for a scan on Wednesday, leading to fears he had suffered a recurrence of an old injury.
But City fans will be relieved to discover that Kompany’s problem is not as bad as first thought after it was revealed he will begin light fitness work on Thursday.
A tweet on the Belgian national team’s twitter feed read: “Good news coming about our captain! He'll start warm-ups tomorrow and we'll take it from there. Won't take any risks, though.”
The 28-year-old has been hampered by persistent calf problems in recent seasons, heightening fears that it may have flared up again.
“He suffered a calf injury here in Belgium yesterday,” reporter Gary Cotterill told Sky Sports News HQ on Wednesday.
“In fact during training he was fine, it was only in the evening he felt his calf and they took him for a scan today as a precaution.
“It’s his left calf but it’s only what they call a contraction of the muscle so it’s not torn, it’s not strained, it’s a very, very slight contraction of the muscle.
“In fact, he may well even play tomorrow night for Belgium. He’s going to warm-up before that game in Liege and decide himself whether he feels or not he can play or whether or not he is going to sit it out.
“But there is certainly no threat to his returning for Manchester City. So good news - Vincent Kompany is OK for Manchester City.”
Earlier in the day Belgium coach Marc Wilmots wrote on Twitter: "No @vincentkompany at training today. He was taken to the hospital for a calf scan. We'll have to wait for the results."
Belgium have since confirmed their line-up for the friendly in Liege will feature either Kompany or defender Laurent Ciman who plays for local side Standard Liege.
Kompany who captained Belgium at the 2014 World Cup in Brazil, has represented his country on 62 occasions since making his debut in a 2-0 defeat by France in 2004.