Horsham's play-off hopes took a knock as they went down to an injury-time winner against promotion rivals Hendon at Queen Street.
Lee Farrell gave the Hornets the lead in the 33rd minute from a Lewis Taylor cross and Jacob Mingle twice went close to doubling the advantage.
The visitors fought back after the break though and levelled through Brian Haule in the 72nd minute before Belal Aiteou-akrim grabbed the winner two minutes into stoppage time.
Hastings United were completely outclassed as they went down 4-0 at promotion hopefuls AFC Wimbledon.
Sam Hutton and Robin Shroot had put the hosts in control in the first half but Hastings almost got back in it when Dan Leach hit the bar twice in quick succession.
A scrambled goal and a Steve Ferguson strike completed the scoring after the break.
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