Leeds United loanee Jamie Shackleton says he must to 'take his opportunities' at Millwall due to the vast competition for places at The Den.
Shackleton initially started his loan spell with the Lions as a regular until Gary Rowett switched from a back five to a 4-2-3-1. He was subsequently reduced to cameo appearances and failed to register a single league start between November and January.
Rowett has preferred a midfield duo of George Saville and Billy Mitchell, but an injury to the latter presented Shackleton with an opportunity to prove himself once again.
