The Republic of Ireland international scored the only goal of the match on Wednesday.
“John O’Shea took the goal really well,” said Ferguson.
“He is a great professional.
“The boy never complains. He is happy to play anywhere.
“He has not always been a No.1 choice but he produces 30 performances a season and it is a contribution we are grateful for.
“He has played in both full-back positions, central defence and in midfield. He is so versatile and offers such great value for us.
“He has played in most games this season. At the present moment in time, he would be in the team if we got to the final.”