Gianfranco Zola has warned Fernando Forestieri he will not play for Watford if he dives, but believes the tumble that saw him sent off in the win at Charlton was a slip.

The 22-year-old Udinese loanee was booked early in the match and was handed his marching orders after collecting his second yellow card in first-half stoppage time, with referee Mike Dean adjudging him to have taken a tumble in the box.

Forestieri's dismissal did not cost Watford as they secured an impressive 2-1 npower Championship victory at the Valley, but manager Zola has told his attacker not to dive - and to change his boots.

"I've seen the video and spoke to Fernando," Zola said. "He told me that he just slipped and that he didn't dive.

"If you watched the game we played at Huddersfield the other day, in the first half he kept slipping. I keep telling him off and telling him to change his boots. He is Argentinian and likes his boots without big studs and on this pitch it was slippy. He keeps doing the same mistake but I don't think he wanted to dive.

"It was a pity Mike saw it as a dive and it was disappointing as he was playing a good match."

Counterpart Chris Powell was left wondering what could have been after a game that Charlton dominated.

"I always knew it was going to be tough," the Addicks boss said. "That is just how this league is. It is unforgiving and we have been hurt by two set plays. I think Ben Hamer only had two saves to make and we've lost the game.

"We've had 15 chances but only taken one so you have to try and be as clinical as you can.

"It is going to be a tough old season, no doubt about it. There will be a few ups, a few downs but you've just got to keep going."