Lionel Messi believes Barcelona need to improve defensively after Saturday's 1-1 draw with Athletic Bilbao saw the champions drop points for the third consecutive La Liga match.
Messi was left on the bench for the first half, with Ernesto Valverde seemingly resting him ahead of Wednesday's Champions League trip to Tottenham.
Without their talisman, Barca lacked creativity at Camp Nou and deservedly trailed 1-0 at the break thanks to Oscar De Marcos' goal.
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Messi was introduced early in the second period, hit the post and ultimately set up Munir El Haddadi for the late equaliser, but he was left unimpressed by Barca's back-line.