Webb was in charge of Arsenal's draw at Liverpool and will referee
their match against Manchester United on Saturday.
Former referee Graham Poll is worried about the pressure Webb will
be under, but a Premier League spokesman told BBC Sport: "Referees
are selected on form.
"Howard Webb is the best performing at the moment and it's only
right he takes charges of the highest-profile games."
He added: "The best referees get the best games."
Webb recently took charge of a Euro 2008 qualifier between Germany
and the Czech Republic and the South Yorkshire official has a
growing reputation.
But Poll told BBC Radio 5 Live: "Never before have you seen a
referee in the Premier League get appointed to the same team in
consecutive weeks.
"It doesn't happen. What's Manchester United manager Sir Alex
Ferguson going to make of that?
"Is Howard Webb going to have to prove his impartiality and will
that mean he is going to favour Manchester United?
"There are all sorts of connotations with it. It's unfair pressure
on a very good referee."
The Premier League spokesman added: "Graham Poll is entitled to his
opinion but it is not particularly helpful."
