Chelsea striker Ba: Newcastle return will be special
He scored 29 goals in 57 appearances there, 13 of them this season prior to his move to London right at the start of the January transfer window.
"It is little bit special because I left just four weeks ago and I still have some good friends at Newcastle," he told Chelsea TV.
"The team has changed a little bit but I still know most of the players. Four weeks goes very fast and I am looking forward to it."