Rory Best says he hopes to play in the Barbarians' next two games after captaining the side on his debut at Twickenham on Saturday.
The 33-31 defeat by Fiji had been billed as the former Ulster and Ireland hooker's final game before retirement.
However, the 37-year-old said: "We'll see how the body stands up and then we'll make a decision."
He will travel with the Baa-Baas squad to face Brazil next week, before they take on Wales in Cardiff.
Best, who won the last of his 124 Ireland caps when they were knocked out of the 2019 World Cup by New Zealand in the quarter-finals, said it was a great honour to be asked to play for the Barbarians.
"It was incredibly special. It is a unique club and I'm delighted to be invited to be a part of it," said Best.
"You be have to invited to play for them, you just don't get picked and any rugby fan knows what they are all about.
"It was brilliant. There were guys I've played against for years and some I didn't know so well. I really enjoyed it."
As is tradition with the Baa-Baas, players take to the field with their club socks along with the famous black-and-white jersey, with Best reflecting that it was quite a poignant moment as he adorned one Ulster sock and one Banbridge sock.
"They are both clubs that have meant a lot to me over a long period of time and I'm incredibly honoured to represent both of them here.
"I'm wearing both to try and keep everyone happy," he joked.
The Barbarians take on Brazil on Wednesday before travelling to Cardiff on 30 November, where Warren Gatland will coach the Baa-Baas in his first game since leaving Wales after the World Cup.