The Williams brothers shared a pitch for the first time with Athletic Bilbao in the LaLiga last night.
Both Nico Williams and big brother Inaki were second-half substitutes for Wednesday night's 2-2 draw with Real Valladolid.
The match marked the first team debut of Nico, who enjoyed an assist for Athletic Club's second goal, scored by Raul Garcia.
The brothers were on the pitch together for 21 minutes.
Also highlighting the game for Athletic Club was a first goal scored by Jon Morcillo.