Matt Spring is an injury doubt for Leyton Orient ahead of their home game against Bristol Rovers.

Spring has been troubled by a calf problem recently and had to come off during the first half of Tuesday night's win over Swindon.

Fellow midfielder Adam Chambers will be out for another three weeks with a shin injury so recent signing Jason Crowe, who came on for Spring, could start.

On-loan Tottenham winger Paul-Jose Mpoku was on international duty with Belgium Under-19s on Thursday night but will be in the squad.

Striker Alex Revell was substituted during the second half against Swindon as he was struggling with a stomach upset in the days leading up to the match but will be fine.

Rovers boss Dave Penney will be without defender Cian Bolger.

Bolger will serve a one-match ban due to his sending off for two bookable offences during the 3-1 defeat at Rochdale in midweek.

The youngster will join experienced centre-back David McCracken, who is still struggling with a hamstring problem, on the sidelines, so either James Tunnicliffe or Carl Regan will be handed the chance to impress.

However, Penney looks unlikely to make further changes after reiterating his intention to keep a settled team.

He told the club's official website: "We are trying to keep as steady and as rigid as we can and keep the same players in, but at the back we are going to have to change it again. It's an opportunity for someone else to come in."

Rovers will be looking to end a run of four league defeats in a row.

Copyright (c) PA Sport 2009, All Rights Reserved.

Do YOU want to write for GiveMeSport? Get started today by signing-up and submitting an article HERE: