Toronto FC coach Paul Mariner admits they're keen on off contract AC Milan defender Alessandro Nesta.

The MLS transfer window opened on Wednesday.

"This club's a massive club," Mariner said. "And I'd put it up there with Los Angeles and New York. This is a really big club and this is a fantastic city in which to live and work.

"And there's no doubt he's a fantastic player. But we'll have to see what happens."