Bruno Fernandes then made it 5-2 to the hosts and completed the rout when he scored an excellent free-kick in the 59th minute to add further gloss to the scoreline.
Greenwood, who is having a breakthrough season, is now the youngest United player to reach the 15-goal mark in a season since Wayne Rooney in 2004.
It seems as though Greenwood is well equipped with everything to become a top star for United and so the only thing one would imagine could ruin his career is a horrific injury.
Rashford and Martial both scored to take their individual tallies past 20 goals for the season - the first time a United strike duo have passed said milestone since Dimitar Berbatov and Javier Hernandez did likewise back in 2010-11. Yet while it was also a third straight league win for the first time since January 2019 United suffered a few scares and the manager may not be happy with what was a slipshod defensive display. "He scores goals and it is a big bonus for us to have him".
At just 18 years of age, the striker has already netted 15 goals in all competitions, including another two in the win over Bournemouth on Saturday.
Australia plans $190 billion defense boost over decade
The spending will include Australia's purchase of AGM-158C Long Range Anti-Ship Missiles from the U.S. The move comes as US President Donald Trump is involved in tentions with China.
"I think we've seen improvement from Mason, Martial and Rashford and they will keep on improving, but we will never standstill".
Manchester United are next in Premier League action when they take on Aston Villa on Thursday night.
But his influence on the Red Devils is illustrated in the fact that Solskjaer's men have averaged 2.2 goals per game in the Premier League since the Portugal global made his debut.
Manchester United's Paul Pogba, left, goes up for the ball against Bournemouth's Jefferson Lerma at crowd-free Old Trafford. After all, they're nine games unbeaten in the Premier League - the longest active unbeaten run - and have conceded just four goals during that time, keeping six clean sheets along the way.
The last time they scored more than five at home was in their famous 8-2 humiliation of Arsenal four months prior.