Pakistan coach Waqar Younis was shocked by Younis Khan's decision to retire from one-day international cricket before the end of their ongoing series with England.
Younis was recalled for the four-match series after being overlooked since Pakistan's exit from the Cricket World Cup in March.
But the 37-year-old confirmed the opening ODI against England would be the last of his 15-year career, a decision which frustrated his coach - though he wished him well in his Test career.
"Reality demanded that he should have completed the series," Waqar said.
"But that is the way he thinks and he is, I am very proud of the way he played the game.
"He will continue to play Test cricket and I am hopeful that he will complete 10,000 Test runs, but it was an unfortunate way [to retire] and the decision was sudden and that was a big shock for us."
After a six-wicket win in the first match, Pakistan fell to a 95-run defeat as England levelled the series.
Waqar admitted complacency may have set in and called on his team to show drastic improvements in the third ODI on Tuesday.
"England bounced back and bounced back well, we were probably thinking that they are not going to play that well so we have to play out of our skins to make it 2-1," he added.
"Obviously we were expecting a fightback from England but we also played poor cricket in that game.
"We were not up to the mark in batting and at no time we were in the game and we must make sure it doesn't happen next time."