The former Chelsea winger has stressed that his compatriot is the Royal Blues' main attacking weapon, and is desperate to bag all three points in Gelsenkirchen
"We mustn't allow Huntelaar any chances," Robben was quoted as saying on the official Bayern website.
Bayern currently sit second in the Bundesliga table with nine points from three games, and Robben is hopeful that they can maintain their perfect record versus Schalke.
"It would be great if we could win the next two or three games as well, because we’d be on a really good run."
Saturday's match at the Veltins Arena is scheduled to kick off at 15:30CET.