[1] He made his La Liga debut on 26 August, playing the full 90 minutes in a 0–0 home draw against Navarrese neighbours CA Osasuna,[2] whose reserves he had already represented in the late 90s/early 2000s.
[3] On his 27th birthday, he scored his first top-flight goal in a 1–1 home draw against Real Murcia CF.
[4] Koi appeared slightly less in the following two seasons for Athletic, but still totalled 52 official games (ten in the Copa del Rey, with the team reaching the final in the 2008–09 edition, and one in the newly created UEFA Europa League).
[5] Koikili was deemed surplus to requirements at Athletic in 2011–12 after the appointment of manager Marcelo Bielsa, alongside teammates Aitor Ocio and Iban Zubiaurre – he remained with the club, however.
[6] On 25 June 2014, he retired at age 33 after spending two Segunda División seasons at CD Mirandés.