Bristol Rovers saw defeat in Matt Taylor's first match in charge as they were knocked out of the EFL Trophy by Crawley Town.
The Gas took the lead on the stroke of half-time as Luke Thomas showed great tenacity and dispossessed Aaron Henry to round Corey Addai and fired into an empty net.
Scott Lindsey's side equalised early in the second-half as Jack Roles smashed the ball past Cox, as he found space on the edge of the Rovers penalty area.
The Gas looked to respond quickly and Harvey Vale was seen to have been brought down by Addai, however the referee waved play on.
The hosts took the lead 20 minutes from time as Harry Forster ran through the heart of Rovers defence and smashed the ball past the helpless Cox.
Here is how the Rovers players faired...
5. Lewis Gordon (subbed off, 45') - 7
Was comfortable at left-back for the Gas and was replaced at the interval. | CameraSport via Getty Images
6. Sam Finley - 6
Dictated play for the Gas in the middle of the park with great intricacy in the first-half. However was dominated by Crawley's midfield in the second-half. | Getty Images
7. Antony Evans (subbed off, 63') - 6
Was quiet in the opening half an hour for the Gas, however the midfielder grew into the game. He should have scored early in the second-half, but his shot was blocked and went for a corner. | Getty Images
8. Luke Thomas (subbed off, 55') - 8
Showed great tenacity to poach the ball off Henry for Rovers' opener and was a livewire for the visitors. Unfortunately was replaced in the second-half due to injury. | Getty Images