Despite his large build, Forster has a high level of agility; Ian Brown who coached him as a youth at Wallsend said that "he was and is an amazing shot stopper. I've seen him for Southampton save shots he shouldn't, his body bends." In one-on-one situations, he appears to make his already large stature even bigger to an onrushing opponent. Forster was, however, criticised in the early part of his time at Celtic for lacking confidence and command, and uncertain when he had the ball at his feet. In time he matured, with his confidence and kicking noticeably improved. His level of concentration was also noted; given Celtic's dominance over the majority of their opponents in Scotland, their goalkeeper often has long periods of inactivity, but when eventually called into action Forster was invariably alert and ready. In 2013, Italian goalkeeper Gianluigi Buffon praised Forster, stating that he had the potential to become one of the best goalkeepers in Europe.

From English Wikipedia, CC BY-SA