A dramatic stoppage-time penalty save by Joe Lewis earned Peterborough a 2-1 victory at promotion rivals Chesterfield.

The young keeper dived to his left to turn away Peter Leven's spot-kick after substitute Tom Williams had been red-carded for pulling down Jack Lester less than a minute after coming on.

The visitors had appeared to be coasting to victory when top-scorer Aaron Mclean and George Boyd gave them a two-goal cushion.

But Leven set up a dramatic finale with a late reply only to fail with the penalty.

A blunder by Chesterfield goalkeeper Barry Roche gifted Mclean his 26th goal of the season in the 45th minute and Boyd spectacularly volleyed a second two minutes after the break.

Chesterfield had created little until Leven fired home in the 87th minute from a corner but Lewis was the hero to give Peterborough a vital away win.

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