Rory Hill's 88th minute winner clinched Sevenoaks Town's important win at The Bourne Stadium on Saturday.
Two-goal Hill's deflected free kick maintained Town's 100% home record in the Southern Counties East League Premier Division season, leaving them second in the table, a point behind leaders AFC Croydon Athletic.
Welshman Mark Jones made his home debut up front, while Collins also added Jason Thompson from Cray Valley to his squad in midweek. Craig Holloway and Tom Ripley returned after missing the win at Croydon, with Jack Miles switching to right back. Jimmy Rogers (thigh) and Andy Irvine (back) missed the game.
Hill fired Sevenoaks in front after 25 minutes - before Whitstable levelled through Danny Williams' penalty nine minutes after half-time. Harrison Carnegie went close twice to restoring the home side's lead, before Hill grabbed his second to win the game.
Town striker Byron Walker was floored by Whitstable defender Jack West earning him the seventh booking of the game.
Hill's free kick hit the wall, the heavy deflection sending the ball veering low into the far corner past keeper Dan Eason, sparking huge home delight, knowing how crucial the result was, despite being only two months into the new season.
Hill's double extended his impressive scoring to five in six games, since arriving from Ashford United.
The game between two of the title favourites proved a fiesty affair with referee Joshua Howard hard pressed to keep control particularly in the first half. Hill and Williams were both booked a minute before half time. Whitstable assistant Brendon Cass was dismissed from the dug-out a minute after half time - then Walker and James Morrish also picked up yellow cards after tangling on the touchline.
Hill put Town ahead with a composed finish, taking a touch before firing home after Carnegie's low right wing cross had only been half cleared.
Whitstable skipper Craig Cloke fired wide before Ricky Freeman was denied four minutes before half-time by a fine save from Holloway at the foot of his near post.
Hill's corner was headed against the bar by new-boy Jones, before skipper Corey Holder conceded the 54th minute penalty, Williams converting to put the visitors level.