Doyle suffered a knee ligament injury when on international duty with the Republic of Ireland in March which sidelined him for two months. It was seen as a pivotal blow to Wolves' survival hopes given the impact he has made during the past two seasons. But club-record signing Fletcher has stepped into the breach after a difficult opening campaign at Molineux with six goals in eight games. And former England striker Bull said: "A lot of people were saying when Doyley was out, no-one was going to take his place. "He has done so well during the last two years and been exceptional. "We've done well to keep him in for that many games, being the lone striker for all the season. "Fletcher has come in, he's got his feet under the door and had a few games under his belt now. "He's been showing he is as good as Kevin Doyle with his work-rate and goals. "He hadn't been getting much of a sniff because of Doyley's form but Fletcher scored a lot of goals for Burnley. "It is not a fluke what he is doing now. He is a natural goalscorer. He has proven to be that now with his strikes outside the box, headers inside the box, little flick-ons. "He is an all-round good striker and it is a good job he has come into good form when Doyley was out." Bull recognises the part played in Wolves' revival and, in support of Fletcher, performed by makeshift striker Stephen Ward, whose preferred position is full-back. He said: "Wardy has got a great engine. He can give you 80-90 minutes full throttle and then carry him off on a stretcher. "His energy on the pitch is unbelievable and I'm sure Fletch will have appreciated it and the work he puts in."
