<p>A glorious rainbow provided a fitting backdrop to West Ham United's last FA Cup tie at Upton Park but Manchester United ended a momentous evening hinting at a brighter future after reaching the semifinals with a 2-1 victory.<br /><br /></p>.<p>Much-maligned all season and in grave danger of missing out on Champions League qualification after a drubbing at Tottenham Hotspur, United returned to the capital to produce one of their most vibrant displays of a poor campaign.<br /><br />Teenager Marcus Rashford broke the deadlock with a sensational curling shot after 54 minutes before Marouane Fellaini's close-range effort sent United's fans barmy.<br /><br />James Tomkins's header set up a nerve-jangling finale as West Ham threw the kitchen sink at David de Gea's goal but Andy Carroll headed a glorious chance over and the Spanish keeper produced heroics to repel a late onslaught.<br /><br />West Ham talisman Dimitri Payet struggled to conjure any magic and a tired-looking London side were tormented by Rashford, Jesse Lingard and Anthony Martial as United's slick passing took its toll.<br /><br />West Ham keeper Darren Randolph saved from Fellaini and Lingard before halftime, but he was a mere spectator as Rashford broke the deadlock.<br /><br />Played in by Martial, the 18-year-old Rashford left Tomkins for dead on the edge of the area before finding the top right-hand corner with a sumptuous shot for his sixth goal for United.<br /><br /> Fellaini was rewarded for an industrious display when he deflected in Martial's driven cross to double the lead. When Tomkins headed in for West Ham, United came under a ferocious aerial assault but Carroll headed over and De Gea made a brilliant double save to deny Cheikhou Kouyate and Carroll.</p>
<p>A glorious rainbow provided a fitting backdrop to West Ham United's last FA Cup tie at Upton Park but Manchester United ended a momentous evening hinting at a brighter future after reaching the semifinals with a 2-1 victory.<br /><br /></p>.<p>Much-maligned all season and in grave danger of missing out on Champions League qualification after a drubbing at Tottenham Hotspur, United returned to the capital to produce one of their most vibrant displays of a poor campaign.<br /><br />Teenager Marcus Rashford broke the deadlock with a sensational curling shot after 54 minutes before Marouane Fellaini's close-range effort sent United's fans barmy.<br /><br />James Tomkins's header set up a nerve-jangling finale as West Ham threw the kitchen sink at David de Gea's goal but Andy Carroll headed a glorious chance over and the Spanish keeper produced heroics to repel a late onslaught.<br /><br />West Ham talisman Dimitri Payet struggled to conjure any magic and a tired-looking London side were tormented by Rashford, Jesse Lingard and Anthony Martial as United's slick passing took its toll.<br /><br />West Ham keeper Darren Randolph saved from Fellaini and Lingard before halftime, but he was a mere spectator as Rashford broke the deadlock.<br /><br />Played in by Martial, the 18-year-old Rashford left Tomkins for dead on the edge of the area before finding the top right-hand corner with a sumptuous shot for his sixth goal for United.<br /><br /> Fellaini was rewarded for an industrious display when he deflected in Martial's driven cross to double the lead. When Tomkins headed in for West Ham, United came under a ferocious aerial assault but Carroll headed over and De Gea made a brilliant double save to deny Cheikhou Kouyate and Carroll.</p>