Squads:

Northamptonshire: Lewis McManus, Harry Gouldstone, Sam Whiteman, Arush Buchake, Ricardo Vasconcelos, Matthew Breetzke, Hassan Azad, James Sales, Chris Lynn, Karun Nair, Justin Broad, George Bartlett, Krish Patel, Gus Miller, Rob Keogh, Aadi Sharma, Tim Robinson, Stuart van der Merwe, Louis Kimber, Ravi Bopara, Saif Zaib, Josh Cobb, Luke Procter, Gareth Berg, Liam Patterson-White, Chris Tremain, Calvin Harrison, Nathan McSweeney, David Willey, Ashton Agar, Fateh Singh, Tom Taylor, Graeme White, Ben Sanderson, Jordan Buckingham, Ollie Sale, Simon Kerrigan, Dominic Leech, Siddarth Kaul, Liam Guthrie, Yuzvendra Chahal, Harry Conway, Raphael Weatherall, George Scrimshaw, Tiaan Louw, Lloyd Pope, Nirvan Ramesh, Benjamin Whitehouse

Middlesex: Jack Davies, Joe Benjamin Cracknell, Pieter Malan, Sam Robson, Max Holden, Ben Geddes, Aaryan Sawant, Kane Williamson, Leus du Plooy, Josh De Caires, Daniel O'Driscoll, Luke Hollman, Ryan Higgins, Nathan Fernandes, Sebastian Morgan, Blake Cullen, Toby Roland-Jones, Tom Helm, Tim Murtagh, Max Harris, Ishaan Kaushal, Toby Greatwood, Zafar Gohar, Naavya Sharma, Josh Little, Dane Paterson, Henry Brookes, Noah Cornwell, Olly Stone