Aitor Karanka says Boro must be switched on to all threats - not just Romelu Lukaku - if they're to have any chance of beating Everton.
The Toffees turned in an impressive second-half display during their last outing, a comfortable 3-0 win over Sunderland, with Lukaku scoring all three in a deadly 11-minute spell.
Karanka, who saw his side punished by Crystal Palace's Christian Benteke last weekend, believes that Everton pose Boro's toughest test yet on their return to the top flight.
"We had a good test last Saturday with Benteke and we suffered against [Lukaku] last season when we played them in the cup, so it's nothing new for us," he told reporters.
"We all know what a good player Lukaku is and how important he is for them but we can't think that it's just Lukaku.
"They have really good players and a really good manager so it's going to be a really tough game but we've been working for two-and-a-half years to play in these kind of games."