Head coach believes Altidore is amongst the best frontmen in Europe.
Paolo Di Canio feels he's added a top-line striker in US hotshot Jozy Altidore.
Di Canio added the AZ Alkmaar hitman to his squad on Tuesday with Altidore penning a four-year deal at the Stadium of Light.
The 23-year-old averaged better than a goal every other game for Alkmaar and netted 31 times in all competitions last season.
He has also scored 17 goals in 60 international appearances for the US.
The striker, who became Sunderland's sixth summer acquisition, joined up with his new team-mates in Italy after signing and played the second half of a behind-closed-doors practice match on Wednesday.
And Di Canio is delighted to have bolstered his forward line, saying: “I’m really pleased because a new arrival can benefit the squad and also individuals because there is competition up front.
“Altidore is one of the top strikers in Europe. He only joined us on Tuesday but I’m very happy, curious and excited because I have a very good attacking side at the moment.”