Walsall manager Chris Hutchings was understandably delighted after seeing his side condemn Leeds to a first home league defeat since January 2009.
Dwayne Mattis fired the Saddlers in front just 41 seconds after the restart and although Gary McSheffrey levelled matters shortly after following a mistake by Clayton Ince, defender Clayton McDonald headed home an 81st-minute winner to seal a shock triumph.
Hutchings said: "It's only three points but it is nice to come to Elland Road and win. We had to defend well, put our bodies on the line and ride our luck at times because Leeds are a very good side."
He added: "We got our just rewards but we have to be more consistent. We were disappointed to concede a goal but Clayton Ince takes the responsibility for that. I don't know if the ball was over the line for our second goal but the officials said it was, so we are pleased with that."
Speaking about the winner, Leeds manager Grayson added: "We've looked at the replay from all angles and it's inconclusive. Until goalline technology comes in there is nothing you can do about it."
Colchester boss Aidy Boothroyd hailed his side's resilience after they moved up to third in League One with a 1-0 victory at Yeovil.
Kayode Odejayi's goal after 38 minutes was enough to see off the Glovers and lift Colchester to within three points of second-placed Leeds.
Boothroyd said: "There were some wobbles in the first half in defence and we had to sort things out at half-time. But overall I was pleased with the performance and pleased for the few fans who made the long trip down."
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