Tim Cahill has given new Socceroos coach Ange Postecoglou an injury scare after his chances of lifting the MLS Cup were destroyed by the Houston Dynamos in New York on Thursday (AEDT).

The New York Red Bulls midfielder could hardly run towards the end of a shock 2-1 extra-time home defeat and admits he’s unsure if he’ll be able to join up with the Australia squad for the match against Costa Rica on November 19.

Cahill was devastated to have his MLS season cut short having helped the club win its first piece of silverware last week by lifting the Supporters Shield – the trophy awarded to the team with the best overall points tally from both the Eastern and Western divisions.

The former Everton midfielder will monitor the situation in the next few days before letting Postecoglou know if he’ll be fit to join with the squad in Sydney.

“I cramped up in my thigh towards the end. I had someone step on me in the last game and tonight in the second half of extra time I just seized up when I jumped,” Cahill told AAP.

“I felt a cramp just on my thigh underneath my hamstring. I couldn’t straighten my leg so I was struggling to run. I couldn’t believe it.

“I couldn’t do anything. I have no football now for six weeks other than playing for the national team and hopefully I will be ok for that. I’ll patch myself up and go again.

“But to be honest I wasn’t banking on having such little football to play.”

This was a bitterly disappointing night for the Australian, especially after former Charlton striker Bradley Wright-Phillips had given New York a 23rd-minute lead.

But Houston, who had recovered from a two-goal deficit in the first leg on Sunday to level the tie 2-2 refused to wilt.

A shocking error from Ibrahim Sekagya helped Brad Davis pulled them level again on 36 minutes before a scrambled extra time strike from Omar Cummings in the 104th minute sealed Cahill and Thierry Henry’s fate.

With the Red Bulls out of contention for the end of season MLS Cup, Cahill is facing four months without club football.

A loan move to Europe in the New Year could be an option but it was a possibility he played down.

“No, I am looking to get myself right now And my focus will be on the national team and help them prepare for a World Cup which is coming up,” he said.

“It’s so disappointing. We gave them a gift, over the two legs we were the better team. We gave it to them and they should enjoy it.

“They are an ugly team to play against, they destroy the game but to come and beat us on their own turf shows they are decent too.”

Cahill also said he disappointed to hear Mark Schwarzer had retired from international football at the age of 41.

“Yeah I was surprised to see Mark retire,” said the 33 year-old, who finished as the Red Bulls top scorer with 11 goals.

“He’s a great keeper and it’s sad for him to retire but that’s his choice and I respect it.”