The Sky Sports pundit wanted Arsenal to sign the Tottenham defender this summer.
The Belgian has been in superb form in north London since leaving Southampton, emerging as Tottenham's leading defender despite only arriving this season.
And Nicholas wanted Arsenal to sign the 26-year-old, so impressive was he during his time at St Mary's.
Indeed, when picking a combined north London XI, the pundit heaped praise on Alderweireld.
Nicholas told Sky Sports: "Toby Alderweireld is the one Tottenham player I've been very impressed with. When I saw him playing for Southampton I was desperate for Arsene Wenger to go and get him.
"He has a controlled aggression and can give it back. Jan Vertonghen for me tries to be aggressive but falls down whenever he gets touched and I've never liked that."
Alderweireld has clearly flourished at White Hart Lane this season and, as Nicholas states, it's easy to see the Belgian outshine - even if only marginally - centre-back partner Vertonghen.
The 26-year-old will need to be at his sharpest against Arsenal this Sunday, as the Gunners break with speed and Alderweireld will have to lead the back line.
How different would life have been for Tottenham and Arsenal had the Belgian moved to the Emirates instead of the Lane?
Spurs travel across north London hoping to beat their fierce rivals for the first time this campaign, having lost to them in the Capital One Cup a matter of weeks ago.