#1 Shane Carwin - UFC 116 (July 3, 2010)
Brock Lesnar's UFC Heavyweight Championship defence against unbeaten challenger Shane Carwin was the draw for UFC 116 and the main event delivered in spades.
Carwin had finished all 12 of his previous opponents in the first round and came close to doing the same to Lesnar.
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Carwin unleashed a barrage of blows, pummelling the champion up against the fence. Lesnar could not respond and did extremely well to manoeuvre himself out of danger. Lesnar showed immense heart to hang in there and survive to round two.
In the longest match of his career, Carwin tired and an opportunistic Lesnar was able to take full advantage to lock in a submission for the win. It was Lesnar's finest MMA fight and an incredibly entertaining battle of the behemoths.
Lesnar was still the reigning Heavyweight Champion. Can he regain that belt in 2019?