The Rovers manager said: "Thierry Henry was an outstanding player for them for many, many years and you always feared an Arsenal side with him in the line-up.
"But they have got other young players that can come to the fore and start to flourish and be the main guys for Arsenal for many years.
"If you look at the likes of van Persie who has been a thorn in our side in recent years, he is an outstanding talent and maybe it's time for him to step up to the mark and be the main man.
"When one great player leaves a great club, invariably another player steps in to his place."
