Blues fans are waiting for the midfield duo to catch fire.
Watson told the Birmingham Mail: "With Alex and Jean, there are different issues. Alex has not played as much football as he would have liked, we're actively trying to get him up to a match level.
"Jean had a fantastic World Cup, he had injuries and then we had to wait for a work permit. So he's another one who needs that regularity of training.
"But these guys have got great pedigree and we're sure that they will make big contributions for us."