The Wales boss insists he will not have a problem calling upon the 32-year-old to face Cristiano Ronaldo's Portugal.
Wales manager Chris Coleman has said, as quoted by the West Ham United official website, that he has complete faith in James Collins if he asks the 32-year-old to step in to face Portugal in Wednesday's Euro 2016 semi-final.
Coleman's side have enjoyed a remarkable journey in France which has seen them top Group B and defeat Northern Ireland and Belgium to reach the last four of their first major tournament since 1958.
Collins played a big role in his country's qualification for the tournament, but has played just four minutes as a substitute during the final event this summer.
However, with Swansea City's Ben Davies suspended after picking up a second yellow card in five matches in the superb win over Belgium in the quarter-finals, the centre-back could be in line for his first major tournament start in the last-four clash on Wednesday night.
Despite Collins' lack of action until now, Coleman has insisted that he "won't have a worry" if he chooses to select the experienced defender because of the leadership qualities that he would bring alongside captain Ashley Williams.
Coleman said, as quoted by the Hammers website: "If it is the big man [Collins] on Wednesday, I won’t have a worry. He is older than most of our boys, he has been there and seen it. He has that experience and is a bit different.
"You need something in there that’s a little bit different and he is that. The guys who haven’t been playing have been different class and Ginge is probably the biggest voice amongst them all.
"Professional players are different to my day but Ginge is the closest to my era that I have seen in the modern-day player."
Collins certainly has the experience; the former Aston Villa man has 370 club appearances to his name and will win his 49th Welsh cap if selected on Wednesday.
He played just 25 times for West Ham last season as he sporadically struggled with injury problems, but he is a more than able deputy as Wales look to continue their European fairytale.