Squads:

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

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