In an interview with Fox Sports 1, former New York Red Bulls and AZ Alkmaar star Altidore admitted it would be difficult to get back to his absolute MLS best but said he was certainly relishing the challenge.
"I think the project in Toronto was something I think that any player would be excited about," Altidore said.
"It's one that's going test me in a lot of ways, a lot of similar ways that I was tested in Europe, so I figure it's a step in the right direction and a step that's going to help me improve as a player and a person.
"[US boss Juergen Klinsmann's] been very open, very honest about how he feels certain players should approach certain situations in their career. But I think from player to player it differs.
"So for me, I thought this particular challenge that I have in Toronto I think will still help me improve and will still help me keep my level high enough to contribute at the national team or else I wouldn't have made this decision."
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