 Nyorai kuenderera kweiyi ndima - Mwaka wa2002-03 wakaona kirabhu ichisvika kumagumo e2003 UEFA Cup. Mushure mekurasikirwa nenzvimbo muChampions League zvichitevera kukunda zvibodzwa kuBasel, Celtic yakadonha muEFAFA Cup. Mumutambo wekutanga, Celtic yakabatanidzwa neLithuanian side Sūduva, naLarsson achihwina hat-trick mukukunda 81 mukutanga kwemutambo, sezvo ivo vakafambira mberi 101 pahuwandu mushure mekuwedzera 20 kuhwina kure. Rwendo rwechipiri rwakaona mutambi-maneja weRangers Graeme Souness Blackburn Rovers divi rinoshanyira Celtic Park mumutambo wakafananidzwa unonzi Hondo yeBritain. Celtic yakapinda mumutambo wechipiri paEwood Park 10 ichitungamirirwa nechinangwa chakapedzisira chaitwa naLarsson. Mushure mekutaura kwevatambi veBlackburn mumapepanhau, avo vaifunga kuti timu yavo yaifanirwa kukunda, vachiti tie yaive sevarume vachipesana nevakomana, Larsson akarova chibodzwa chekutanga mukukunda 2 0. Mumakwikwi akatevera akaona Celtic ichikunda Celta Vigo 22 pazvinangwa zvekuenda, uye VfB Stuttgart 54 pahuwandu. Larsson akarasikirwa nemakwikwi maviri neStuttgart, zvichitevera kuputsika kwechigunwe, mushure mekurovera naGustave Bahoken mumutambo weSPL neLivingston, asi akadzoka kubva mukukuvara panguva yekurwisana kweCeltic nemakwikwi e2001KuLiverpool. Larsson akahwinha muedzo wokutanga mukukwikwidza kwe1x1 kuCeltic Park. Celtic yakatevera iyo ne 20 kukunda paAnfield kukunda tie 31 pahuwandu, 