Lowe, 25, has signed a three-year deal with the Latics after scoring 30 goals in 119 appearances for Pompey.

Sterling, 19, spent last season on loan with Coventry City, where he made 40 appearances for the Sky Blues.

Both players could feature for Paul Cook's side in their Championship opener against Cardiff on Saturday.

Lowe, who played under Cook at Portsmouth, told the club website: "It's been a long couple of months and there's been a lot of speculation with some discussions back and forth, but I'm happy that it's finally done with and I can concentrate on getting ready for the season.

"There was some relief when the pen hit the paper and also excitement because it's a great opportunity to play in the Championship under a manager who has shown his faith in me before."