Speaking to the club’s media about this week’s game, Shackleton claimed that Costa could add something different to Leeds’ attack.
Pablo Hernandez is all set to miss this weekend’s game with an injury and Costa is expected to be a replacement.
The former Wolves man has impressed during his cameos this season and he will get a chance to hold down a regular starting berth now.
Shackleton revealed that Costa works hard in training and he is brilliant in one vs one situations.
“Helder gives everything in training,” Shackleton told LUFC. “All the boys, we train like we play and Helder is exactly the same.