The Gunners endured a chastening experience on Tuesday night as Lionel Messi scored twice in the final 19 minutes at the Emirates Stadium.
Until Wenger signs a striker of Thierry Henry’s calibre, people will continue to complain about Giroud
Barcelona’s 2-0 first-leg win puts the holders in firm control of the Champions League last-16 tie ahead of the return leg at Camp Nou on 16 March.
Arsenal haven’t reached the quarter-final stage of Europe’s premier club competition since 2010 and Barcelona have won the trophy twice during that five-year stretch.
Former England defender Keown urged his ex-manager Arsene Wenger to sign better players in the summer if the north London side are to close the gap on the La Liga champions.
“If Arsenal are going to reach Barcelona’s level, they must look to sign better players,” Keown told Daily Mail.
Keown added that Wenger needs to recruit a world-class striker to appease Arsenal supporters who have grown dissatisfied with Olivier Giroud.
“Olivier Giroud played well and worked very hard on Tuesday – at one point he was making tackles at left back – but until Wenger signs a striker of Thierry Henry’s calibre, people will continue to complain about Giroud,” Keown added.
Arsenal are in third place in the Premier League table.
MORE: The latest football news