Goals from Brown Ideye (two), James Morrison and Saido Berahino ensured West Brom booked their place in the sixth round for the first time in seven years, but Pulis is unwilling to contemplate the possibility of taking the Baggies to Wembley.
“We mustn’t get carried away,” Pulis told BT Sport.
“It was a good performance, we’re pleased, but there’s still a long way to go in the league and we need a little bit of luck in the next draw.”
Pulis was more forthright about two-goal Ideye and dismissed speculation the club’s record signing had been set for The Hawthorns exit door during the transfer window.
“Even if we brought Carlton (Cole) in, we still would’ve needed another forward to have stayed so I’m not so sure he would’ve left,” Pulis added. “But he’s done absolutely fantastic and there was a weight on his shoulders and scoring goals takes that weight off and he’s blossomed and looks a good player.”
While Pulis refuses to look further than the next round, Ideye, who has scored four goals in three games, sees no reason why West Brom cannot win the trophy. “If we continue like this, good things will happen,” he said.
West Ham’s miserable afternoon was made all the worse by substitute Morgan Amalfitano’s second-half dismissal, which didn’t impress manager Sam Allardyce. “It’s unprofessional, isn’t it? That will be dealt with, as always, internally and we’ll move on.”
Former Everton and Middlesbrough striker Ayegbeni Yakubu showed his old class as Reading won 2-1 at a Derby side reduced to 10 men for 50 minutes. Full-back Stephen Warnock was sent off for a second yellow card in the 39th minute but Reading made the advantage count. Hal Robson-Kanu’s goal was cancelled out by Darren Bent but Yakubu, signed as a free agent during the January transfer window, netted the winner.