"It's a pretty disappointing way to end the week," said Bevin.
"At the end of the day I'll look back and say it was a great week, but obviously it's going to hurt for a little while to lose that lead on the last day."
It was an incredible effort to even be on the start line, having suffered a bruised hip, bruised rib and multiple contusions in yesterday's crash. However, Bevin was determined to fight until he had nothing left, and was safely in the peloton until the race's penultimate climb - the first of two 3.6 kilometre ascents of Willunga Hill.
At an average gradient of 7.1 per cent, Team Sky pushed the pace, and Bevin couldn't fight any more, sliding out the back of the peloton and seeing his hopes of overall victory vanish.
That left Bennett as New Zealand's prospect for a top overall result, but he couldn't deliver either. Having stated his distaste of Willunga Hill earlier in the week, he started the climb surprisingly well back in the pack, and while he worked his way back to the front with 1.5 kilometres to go, he - also in a repeat of last year - attempted to follow the move of Porte but cracked, eventually losing 20 seconds.
Bevin, meanwhile, will rue the ill-fortune which saw him miss out on a golden opportunity to win a World Tour race. It could be a while before such an opportunity comes around again, but with his speciality time trials a big fixture in his upcoming races this season, there should be further stage victories and leaders jerseys heading Bevin's way in 2019.