Ireland captain William Porterfield has lamented the lost opportunity against Afghanistan.
Rahmat Shah was Man of the Match for his twin fifties in Dehradun against Ireland.
Needing 118 runs to win, Afghanistan won by seven wickets before lunch on day four in Dehradun.
Chasing 147 to win, Afghanistan were 29 for one at stumps on Day three.
Rahmat Shah became the first batsman from his country to record a Test fifty
In their maiden Test assignment, against Pakistan last year, Ireland recovered from a poor first innings batting display to leave quite an impression.
Paceman Yamin Ahmadzai and off-spinner Mohammed Nabi took three wickets each to rattle the opposition batting after Ireland elected to bat first.
Tim Murtagh and George Dockrell led a brilliant rearguard to push Ireland to 172-all out.
Mohammad Nabi (3/6) and Rashid Khan (2/5) gave Ireland's batsmen a shock in Dehradun.
Ireland pacer Boyd Rankin has said that bowling well against Afghanistan will put his team in a better spot to win the one-off Test.
The focus is now on the tour finale on Friday with both teams going into their second Test.
This is the second Test match for the two teams, who made their debuts in 2018.
Left-arm spinner Zahir was not picked in the original squad due to fitness issues, but he has now received a clean chit.
The two teams will play a one-off Test starting March 15 in Dehradun.
Afghanistan recovered from 50/4 to put up a respectable total on the board.
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