Complex sentence: On his managerial debut for Barnet his side lost 1-4 at Underhill to Plymouth Argyle which Davids had left himself out of the squad for this League 2 game.
Split into simpler sentences: On his managerial début for Barnet his side lost 1-4 at Underhill to Plymouth Argyle. Davids left himself out of the squad for this League 2 game.