The 26-year-old is now deciding where his future lies, with Newcastle confident they can finalise a deal for him which would see him move on a free transfer following West Ham's relegation from the Premier League.
"Demba Ba has done very well since he came to England and he's a good player," he said.
"I'm very much aware of him and I probably know what he is capable of more than most because I've known about him for a while, before he went to West Ham.
"We're not the only club who are interested, but we are trying. There is always competition and we will keep plugging away.
"If we can get him and another two in before the end of next week I'll still be looking for another two new faces to join us before the start of the season.
"To get a player like Yohan Cabaye in so early has been a big bonus. Not many clubs have managed that sort of business yet so I'm very happy with that."