It was a brilliant performance, but who stood out for the Reds?
Here are Mark Dunford's player ratings for the game.
You can see our live blog from the game here.
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Who were the Reds fans applauding against Colchester United?
. Glenn Morris 9
Two brilliant saves - one in each half - from Alan Judge. A typical Cat performance. Near faultless
. George Francomb 8
An industrious display from the skipper.
. Tony Craig 8
Led the back three well. Won almost every ball that came his way.
. Jack Powell 8
One of his better games this season. Great distribution. So close to making it four when free-kick hit the bar.
1. Glenn Morris 9
Two brilliant saves - one in each half - from Alan Judge. A typical Cat performance. Near faultless
2. George Francomb 8
An industrious display from the skipper.
3. Tony Craig 8
Led the back three well. Won almost every ball that came his way.
4. Jack Powell 8
One of his better games this season. Great distribution. So close to making it four when free-kick hit the bar.