Grant took over from Jose Mourinho as Chelsea manager two weeks ago.
He said: “I believe the fans will be very happy with the result but I cannot say it’s my best-ever win.
“I’m pleased with the result as I hope it’s the start of a new, good era. I’m not surprised. I said before I was very happy with the players’ attitude in a difficult time.
“We’ve played well in the last two games without winning and have kept 11 players on the pitch so I must congratulate them.
“JT plays with all his heart. I don’t know how many players could play with this injury. When you want a player to lead by example, there is no one better.”