Stoke chairman Coates delighted seeing Adam on scoresheet
Coates is happy Adam's recent impact after a frustrating first campaign at Stoke for the Scotland international.
"He scored the goal on Saturday and that is very important, especially when you are having a lean time," he explained.
"He arrived to score when it mattered and there is nothing wrong with a long ball.
"It's about it being a good ball, no matter whether they are long, short or medium in length."