Finch smashed a 44-ball 63 but appeared to struggle as he ran between the wickets in the later part of his sensational knock as Australia posted 179 for 5.
The 35-year-old, who also suffered a hamstring injury in 2016, left the field early during Ireland’s chase, which ended at 137 all out in 18.1 overs.
“I really think a hammy twinge, I’ll get a scan tomorrow, I have a history of them. It doesn’t look bad at the moment but let’s see how it goes after the scan,” said Finch during the post-match presentation.
Singapore-born all-rounder Tim David also spent the entire Ireland innings off the field, but Finch said it was “just a bit of hammy stiffness, it was more precautionary than anything.”
Finch, who was adjudged the Player of the Match, said it was a tough track to bat on, but he was happy that the team was able to post a good score.
“It was a good performance. Getting 180 was a decent score on that wicket. We knew we had to lay the foundations early and couldn’t risk being 4-5 behind.
“It wasn’t the easiest wicket, it was a lot slower than we expected. They changed their pace really well and bowled a lot of cutters early in the innings, it was hard to get a rhythm and we did well to 180 to get,” he said.
Ireland captain Andy Balbirnie praised Lorcan Tucker, who battled to the end with an unbeaten 71 from 48 balls but lacked support from the other end.
“The first innings got away, we bowled well but a few overs didn’t go our way and certainly didn’t start with the bat, but to show the fight at the end was nice,” he said. said.
“Looking at the scoreboard we thought it wasn’t against us, again the wicket column was an issue and who knows if anyone stayed with Tucker. He’s had a really good World Cup and these wickets here suit him. ”
On the strength of this victory, Australia, with five points from four games, jumped into second place in Group 1 ahead of England to be in contention for a semi-final place. New Zealand leads the group.
Australia take on Afghanistan in their final group match on Friday in Adelaide.