West Ham squandered a hatful of chances before dropping two vital Championship points after conceding yet another costly last minute goal.
Having been pegged back after taking an early lead, Sam Allardyce's side looked like taking all three points having regained the advantage on the hour mark.However just as it was against Cardiff on the opening day of the campaign, the Irons conceded in the final minute of normal time to drop yet more home points.
Although the game ultimately ended in a disappointing fashion, it couldn't have got off to a better start for West Ham.
Having gone for the jugular from the kick off, Carlton Cole scored his second goal in successive matches from United's first corner of the contest with just five minutes on the clock.
One up at the break, and just about deservedly so on balance of play, West Ham came out for the second half looking to add what surely would have been a killer second goal.
However their plans were spoiled when Scottish striker Ross McCormack poked home a 59th-minute equliaser from close range following a sustained spell of pressure by Leeds.
The visitors then made the classic mistake of sitting back upon scoring - and were duly punished when substitute Julien Faubert's cross was somewhat embarrassingly turned into his own net by defender Patrick Kisnorbo less than three minutes after they had drawn level.
And that's how it looked like staying until the Hammers shot themselves in the foot, again, by conceding a second equaliser in the first minute of injury time.
Having failed to clear their lines - with Herita Ilunga once again painfully exposed as the weak link in defence - the ball rebounded around the West Ham six-yard box before Adam Clayton smashed home the goal that earned the visitors a point - and one that it was hard to begrudge them, given the manner in which they had gone about the game.
Of course, it could have been even worse had Leeds' Max Gradel - a player linked with a move to West Ham all summer - not fluffed a 28th minute penalty that he fired wide of the target.
Then again, West Ham will feel equally disappointed that referee Michael Oliver failed to award spot kicks for either of what appeared to be fairly obvious infringements on James Tomkins and Carlton Cole during the first half.
There will be many teams this season that come to the Boleyn looking to defend in numbers, frustrate West Ham (and the home support) and perhaps nick a goal on the break.
Leeds, to their considerable credit, proved not to be one of them - and despite the disappointment of losing a winning position with seconds remaining, most home fans will agree that they got their moneys'-worth in entertainment terms today, at the very least.
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West Ham Utd 2 Leeds Utd 2: match facts
West Ham Utd: Green, O'Brien, Tomkins, Reid, Ilunga, Noble (Piquionne 82), Parker, Nolan, Collison (Faubert 58), Taylor, Cole (Carew 67).
Subs not used: Boffin, Barrera.
Goals: Cole (6), Kisnorbo (og 62).
Booked: Tomkins (90).
Leeds Utd: Lonergan, O'Dea, Kisnorbo, Lees, Gradel, Howson, Clayton, Snodgrass, White, Keogh, McCormack (Nunez 77).
Subs not used: Rachubka, Connolly, O'Brien, Sam.
Goals: McCormack (59), Clayton (90+1).
Booked: O'Dea (90).
Referee: Michael Oliver.
Attendance: 28,252.
KUMB.com Man of the Match: James Tomkins.
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