Coloccini has been sideliend by a hamstring strain while on international duty with Argentina, but he decided to stay in South America rather than return home.
We saw him in the early hours of Monday morning last week in Newcastle airport, and told us he was pleased to be back on the international scene.
The defender’s injury will be assessed on his return to Tyneside from ahead of the September 17 game against Everton.
The 30-year-old limped out of training earlier this week, and it’s not clear, as yet, if he will be involved in his country’s second game against Peru in Lima on Tuesday night.
Williamson – who played in the club’s two-legged Europa League qualifier against Atromitos – is ready.
Mike Williamson: “It the manager wants to use the squad players for the Europa League, it’s a chance for them to stake a claim for the Premier League.
“We all want to play in the Premier League, and these games are a chance to impress. If a player is given a chance, he’s got to take it.
“We’ve got a big squad now, and that means competition for places.”