West Bromwich Albion have not won in the league since August and currently hover just above the relegation places.
But there will be a feeling of optimism amongst the travelling fans as life without Tony Pulis could spark a positive reaction.
Former Bolton boss Megson will be leading the team out on Saturday, aware of the threat that Spurs pose. And he believes his team must ‘’roll up their sleeves’’ if they are to get a positive result against Mauricio Pochettino’s men.
He said: “They need to pitch up and start playing like we know they can play.
“The first thing you do is the easiest thing, you just roll your sleeves up and have a real good go.
“Tottenham are a fantastic side. I thought their performance against Real Madrid was top class.
“We’re under no illusions, like we said to the players at half-time on Saturday, you’re 3-0 down to one of the best teams in Europe, what do you do?’’
There are several injury concerns for the trip to Wembley as James Morrison and Craig Dawson are still out, while Nacer Chadli tore a muscle in training last week so will miss the return to his former club.
But with Megson wanting to spark a change further up the pitch, he will be happy to see the return of Oliver Burke who could make his first start for the Baggies on Saturday.
Meanwhile, Tottenham have no fresh injury concerns but they are still without Toby Alderweireld and Victor Wanyama.
Albion have lost just one of their last five Premier League visits to Spurs, including the memorable halting of Tottenham’s 2015/2016 title charge.
Tottenham have lost just one of their last 15 top-flight meetings with West Brom – their only defeat being a 0-1 reverse in September 2014.
The Baggies have lost their last four Premier League matches and have had the second lowest amount of shots on goal this campaign with 103.