The midfielder has been used sparingly since his January loan arrival from Borussia Dortmund.
I think I heard somewhere or read somewhere, 'Why did Gio get called in the camp?'," Berhalter said.
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"Well, I think he showed why he got called in again. Amazing quality, amazing talent, and, for us, it's about supporting him through the difficult times of adapting to the Premier League. His quality is unquestionable.
"When you see the plays he made on both the second goal and, I think most importantly, the ball he wins and then makes the pass, he has that quality that not many players have and it's clear that he deserves to play on this team."