T-Mobile Stadium, London
James Douglas's late penalty ended London United's unbeaten start as they lost to their old nemesis FC London 2-1.
Douglas put FCL 1-0 up with a precise header after Umit Kubilay's sweet cross.
But Edward Redwood capitalized on a defensive error from Paulo Silva to equalize.
But John Macdonald handballed in the box after another cross from Umit, and Douglas buried home from the spot to take all three points for the Superhoops.
Juan Trujillo and Paulo Silva looked colossal in the centre of the red-and-white defence but their counterparts in the black John Macdonald and Mark Strickland on the other hand were in for a torrid afternoon.
The exceptional pace of Bob Harry exposed Macdonald and Strickland for the first time this season after the duo had a exceptional start to the season but Simon Herding saved comfortably, after returning from a back problem.
However Silva had one horror error when he passed it straight to Redwood who tucked past Christian Watson after Juan Trujillo crept behind him but virtually had no chance of stopping him legally.
Redwood had an unusual celebration. Instead of his usual 'Rifle' celebration he just used his body language to say get off me, Redsy appearing to struggle with a groin or a hip injury.
And it was clear that he was struggling, because five minutes later, the red-headed assassin limped off for Lionel Nunez.
And FC London could have scored more had not it been for two top goal-line clearances from Ashton Reid and Rodrigo Santos.
Karlo Krzystofski knocked the ball past Herding but Reid was on the line and a frustration from Trujillo as he wrestled with Strickland and Macdonald which looked more like World Class Wrestling than Major League Football.
And Brazilian forward Santos was there to clear ball from Brad Hatfield's hit, resulting in a hug with him and Reid.
Minutes into stoppage time, handbags erupted between both teams, as you would expect in London derbies like these, but referee Martin O'Brien handled the situation well and when the final whistle blew, both sets of players shook hands with each other in very nice scenes.
FC London: Watson; Umit Kubilay, Paulo Silva, Trujillo, Lupatelli; Rhodes, Hatfield (Capper 83), Douglas, Steiner; Krzystofski, Harry (Wisniewski 88).
Subs Not Used: Edmundsson, Andersson, Blake.
Booked: Douglas, Trujillo.
Goals: Douglas 33, 87 pk.
London United: Herding; Mitchell, Strickland, Macdonald, Reid; Cristiano Costa (Parker 81), Warhurst, CraiCo (Adam Stockwell 89); Redwood (Nunez 72), Boyle, Rodrigo Santos.
Subs Not Used: Knott, Croussant.
Booked: Macdonald, Strickland, Reid.
Goals: Redwood 66.
Att: 31,563
Ref: Martin O'Brien (Hampshire).
Panasonic Man of the Match: FC London midfielder James Douglas.