The draw means Barca stay top of La Liga.
Dembele saves the Catalans with late equaliser. Barcelona played out a 1-1 draw away to Atletico in Saturday's top-of-the-table clash.
The scintillating tie that took place at the Wanda Metropolitano stadium between Atletico Madrid and Barcelona ended in a draw on Saturday evening.
Barca’s prodigy Ousmane Dembele came off the bench to help his side seal a point against Diego Someone’s team as his goal cancelled out Diego Costa’s (first goal of the campaign) opener.
Enersto Valverde’s side looked to be heading for a defeat but in the last minute, Dembele - who has recently been called on to follow the steps of his senior teammates - made sure they did not suffer back-to-back league losses as the tie ended 1-1.
The result means Barca stay top of the La Liga Santander table with a point clear off Atleti after 13 games into the season.
On both sides being able to challenge for the title this season, Valverde said as Marca quoted: "I don't know who will be the main rival, but for sure Atletico are one of them.
"For the league, the cup and the Champions League. We must realise the difficulty of playing against Atletico."