Real Madrid will be keen observers at the north London derby as they cast their eye over two defensive targets.
According to reports on Spain, Carlo Ancelotti's side will be looking at Cristian Romero and William Saliba with the view to potential moves.
Real Madrid are unlikely to pursue such deals in January, but could be looking at potential defensive reinforcements with next season in mind.
Los Blancos' chief scout Juni Calafat will be at the Tottenham Hotspur Stadium to take a look at both players, however it's understood that Saliba will be the main player of interest.
The Arsenal man still has three years left on his deal in north London but at the age of 23, he's thought to be a player who can dominate for many years to come.
Defensive additions are a big priority for Real Madrid with David Alaba and Antonio Rudiger both over 30.
As a result, they're looking for additions with the future in mind.
Real Madrid have worked hard over the last couple of seasons to build one of the most exciting teams in world football with new signings including Kylian Mbappe, Jude Bellingham, Arda Guler and Endrick joining stars such as Vinicius Jr, Rodrygo and Eduardo Camavinga.
Saliba is a player who is destined for the very top, a status that he's ready for after speaking about his progress during Euro 2024.
"I think I am in the top three [defenders in the league]", he told L'Equipe.
"We finished with the best defence. I watch a lot of matches. I am a very humble person but last season, just like this season, I am in the top three defenders.
"I need to continue to work to go even higher.
"In terms of concentration, I am a lot better. Before, I could play a top match but in one phase of play, I slept a bit. That is no longer the case. I am always on alert."
Since joining Arsenal, Saliba has made 86 appearances scoring five goals in the process.
In that time he has also helped France to the World Cup final where they finished as runners up, while also winning two Community Shields with Arsenal.