"There's never a good or bad time to play Watford because they're probably the most resilient team around," said Coppell.
"They've taken so many knocks this season but they always come out, give everything and play at 100 miles per hour.
"Their spirit from game to game has been brilliant. Other teams would probably have folded but they keep putting so much into their performances.
"They're a real headache to play against. No team this season has steamrollerd them, with the possible exception of Manchester United.
"The games they've lost have all been tight and, as we haven't beaten them this season, we will take nothing for granted."