The 24-year-old did score in Manchester United's 2-0 win against Dutch giants Ajax in the Europa League final to secure a place in the Champions League this term.
On this early evidence, United now have a focal point whose talents suit their desired style of play and one who can bring out the best of those around him.
Mata's darting runs into the box were bringing United joy and he nearly broke the deadlock when he raced onto Pogba's clever dinked pass and slipped a shot past Hart, only for Angelo Ogbonna to hack clear.
Yet again, West Ham nearly shocked De Gea, when Masuaku floated in a left-wing cross that Arnautović headed over the Spaniard onto the top of the crossbar and, after Antonio Valencia was cautioned for a lunge on the Austrian, Bilić made a double-switch with Diafra Sakho and young Declan Rice replacing Fernandes and the dejected Noble. Marcus Rashford, Paul Pogba, Antonio Valencia and Eric Bailly all start.
Coppa Italia, Benevento-Perugia 0-4
Con un Alberto Cerri strepitoso il Perugia riscatta la delusione del play off ed elimina il Benevento dalla Tim Cup (0-4). Un ko molto pesante che messo in mostra limiti sia dal punto di vista offensivo che difensivo per le 'streghe'.
After Rashford had left the right-hand upright shuddering with a curler from the left-hand apex of the area, Mkhitaryan released Martial to coolly tuck away United's third before Pogba swept in the fourth from 20 yards. Hart comes charging out and makes the save but Mata gets the ball again on the by-line. West Ham may struggle on Sunday but Hernandez will have a point to prove against his former club. He slips in a lovely ball to Lukaku and the Belgian slips it past Hart at his near post. And from the free-kick from Mkhitaryan Lukaku nods it home.
Arnautovic served a reminder of West Ham's threat with a header that De Gea was obliged to tip over, but it seemed only to redouble the home side's determination to stretch their lead.
Paul Pogba has now scored 34 league goals since 2012/13; 16 of them have come from outside the box.
"If the pass is on, the top players will find you".