Bale scored a sensational solo goal in the 85th minute of Wednesday's final to claim the first trophy of his career and hand Real the Cop del Rey.
"That is business as usual for Gareth Bale," Sherwood said.
"We saw what he did last year: 21 goals and nine assists. He scored the winner in eight games."
Sherwood believes his side could have challenged for the league crown if Bale had stayed put.
"We could do with that now, by the way. If you put those points that he accumulated for us on top of what we have got we would probably be challenging for the title.
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