Neil Harris fired home an exquisite 81st-minute free-kick to secure a fifth consecutive win for Millwall as they defeated Exeter 1-0 at the New Den.
The game looked set to end level as Grecians goalkeeper Andy Marriott produced several instinctive saves to frustrate the hosts.
But Harris's ninth goal of the season ensured a deserved win for the ever-improving Lions, while Exeter suffered further misery as Barry Corr saw red for a professional foul late on.
Millwall's recent form has seen them clamber their way into the play-off places and their confidence was apparent as Harris, Steve Morison and Shaun Batt all saw efforts well-saved inside the opening ten minutes.
Marriott, enjoying somewhat of a personal duel with Batt, further denied the winger on three separate occasions either side of half-time, before the veteran keeper denied Morison again with a fine one-handed stop.
Loan signing Jonathan Obika impressed as a second-half sub for Millwall with several dangerous crosses and the youngster won the free-kick from which Harris dispatched a delightful finish.
Exeter offered little threat apart from a speculative Stuart Fleetwood effort as they slipped deeper into trouble.
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