United will close to within a point of fourth-place Manchester City by beating Burnley on Sunday.
Tottenham's last piece of silverware, the 2008 League Cup, was won against Chelsea at Wembley but of their last eight visits to the stadium they have won once - a worrying statistic seeing as they are likely to adopt it as temporary home next season.
Luiz has thrived in coach Antonio Conte's 3-4-3 formation and even his fiercest critics, like former England and Manchester United defender Gary Neville, have changed their mind. They were disappointed after Watford, but we spoke about how we can do better and the last couple of days have been very positive.
"Tottenham have been steamrollering teams in recent weeks but they have not had a serious test since Gent and Liverpool before that".
Taking a longer-term view, Tottenham have won just two of the last 16 meetings between the London rivals, Chelsea winning seven of those.
'We are talking about the team who in the past five years won European competitions, World Cups, a manager who won the title in Italy, they're more experienced'. Despite missing a chunk of the campaign through injury Kane has scored 20 goals - a tally bettered only by leading scorer Romelu Lukaku.
Women's Super League winners Manchester City have five players in the division's team of the year. While the pair appeared to have settled their differences, Costa's form had dipped. Chelsea also have some monsters and play like a monster like N'Golo Kante.
If Spurs have a particular edge it is Harry Kane, who is on his way to becoming a Tottenham legend.
He has been keeping a close eye on the 21-year-old's progress this season and is encouraged by what he has seen.
"This is a semi-final and in the season we tried to have in every position two options", Conte added. They are in good form and they have a lot of enthusiasm. The theory goes that his relaxed style is ideal for the big games, but not for the intensity required to challenge week after week. We have improved - that is a reality. "The team is playing in a good way, exciting football, scoring goals and not conceding not too many goals. Now is the moment to translate those statistics and that feeling to show if we've grown up and learned". As if a berth into the FA Cup final isn't enough incentive, the semifinal victor will have an immeasurable psychological advantage going into the Premier League's stretch run.