Take a look at some of the potential threats in the ranks of Saturday's hosts, Millwall F.C.
The striker is one of Millwall's leading goalscorers in the league so far this campaign, with six goals to his name.
Gregory was on the books of Mansfield Town as a trainee, but the striker failed to make an impact for the Stags and eventually moved to Halifax Town.
During his spell at Halifax, the forward achieved the impressive goal return of twenty-nine goals in just over thirty-five games which drew the attention of Millwall and the striker signed at the Den in June 2014.
Gregory has been in steady form so far this season, with his last goals coming with a brace against Fleetwood Town towards the end of October.
The experienced striker has scored on nine occasions so far this season, with seven goals coming in SkyBet League One.
Building his career during a spell at Stevenage, the forward first moved to the Den in July 2009, where he made over eighty appearances before leaving to join Norwich in June 2011.
Morrison's spell at Carrow Road lasted eighteen months before the striker made a switch to Leeds United.
After struggling for goals at Elland Road, the forward returned to the Den on loan for the 2013/2014 season and made his stay permanent in the summer of 2015.
At international level, the striker has twenty caps for Wales, with one international goal to his name, which came in a qualifying match for the Euro 2012 against Montenegro.
So far this season Morrison has continued his good goals to game ratio, with the striker finding the net six times during August alone.
The twenty-three-year-old striker has fashioned six goals this season so far, in just seventeen appearances.
A product of the Millwall academy, the forward gained first-team experience during various loan spells away from the Den, taking in spells at Crawley, Aldershot and Torquay United.
O'Brien scored on his debut for the Republic of Ireland U21s against Netherlands in 2013 and has scored five goals while representing his country at youth level.
After signing a new contract ahead of the 2014/15 season, O'Brien has seventeen goals to his name while playing for Millwall.
This season the forward started the campaign brightly, with a goal on the opening day of the season against Oldham and scored his last goal in Millwall's victory over Oxford United towards the end of the October.