Southend came from behind to gain their third away win of the season and complete the double over Leyton Orient with a 2-1 victory.
Orient, fielding a side much weakened by injuries, sickness and suspension, had marginally the better of a drab first half and produced the only two token threats on goal.
Captain Tamika Mkandawire forced Southend keeper Ian Joyce to tip his header over at a third-minute set-piece while midfielder Jimmy Smith had a 26th-minute shot comfortably saved.
Orient broke the deadlock when midfielder Adam Chambers pounced on a loose ball and found the bottom corner after 57 minutes.
Southend replied through captain Adam Barrett, who joined the attack and punished Ben Chorley's slack clearance with a similar shot just two minutes later.
The visitors went ahead in the 72nd minute when keeper Jamie Jones initially blocked Lee Barnard's effort only for midfielder Alan McCormack to follow up and score.
Southend had few problems in hanging on for full points while Orient became increasingly frustrated and disorganised as they slumped to their fifth home league defeat of the season.
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