Manchester United had to be patient but eventually cruised to a deserved 3-1 FA Cup win over Reading on Saturday thanks in part to Casemiro's brilliant brace.
The Royals, managed by former United midfielder Paul Ince, frustrated the Red Devils in the first half at Old Trafford, but Erik ten Hag's side simply had too much quality in the end.
Marcus Rashford's disallowed goal in the 35th minute would have been a just reward for United, but a breakthrough was just a matter of time and came via Casemiro's lovely finish.
He then added a long-range second, before Fred's outrageous flick finished Reading off following Andy Carroll's dismissal for two bookings, with Amadou Mbengue's late header a mere consolation.
United were dominant right from the start, with Reading struggling to get out of their half.
Bruno Fernandes went close a few moments before Rashford seemingly ended the visitors' resistance, but his header was ruled out for offside against Wout Weghorst.
Reading then wasted the best chance of the half as Junior Hoilett robbed Tyrell Malacia in the box and forced David de Gea into a vital stop.
United capitalised on that let-off just after the break.
Antony's disguised pass found the run of Casemiro, whose impudent scoop left Joe Lumley well beaten.
Teed up by substitute Fred, Casemiro netted again four minutes later as his first-time 30-yard effort found the bottom-right corner via a slight deflection.
Carroll saw red after a couple of wild challenges, and a minute later Fred made it 3-0 with a sensational backheel from Fernandes' cross.
Mbengue pulled one back with a powerful header, though United's victory was never in doubt.