Will the city of Barcelona sleep tonight? Probably not.

Standby for plenty of sore heads in Catalonia tomorrow.

Time for me to dash. Before I do let me point you in the direction of these two pieces on the BBC Sport website.

Spanish football writer Andy West argues that change is needed at Barca for a European challenge - despite being dominant in Spain.

You can read that here.And you can read a match report on tonight's game here.

Many thanks for your company.

Until next time.

What a performance by Lionel Messi.

A hat-trick on the night his team wins the title.

But a word about Luis Suarez. He's the first player to assist Messi for three goals in the same game in all competitions.

Throwing away a 4-1 lead against Roma and crashing out of the Champions League was a crushing blow for Barca.

But they've responded by securing a domestic Copa del Rey/La Liga double.

Is it enough for a club like Barca where European success is crucial?

Will Real Madrid give Barca's players a guard of honour at the Nou Camp next Sunday?

A La Liga double over Real would be the icing on the cake for Ernesto Valverde in his first season in charge.

Barca's players are making their way over to applaud their travelling fans.

Meanwhile, Deportivo's players are in a huddle on the pitch.

They've been relegated on the back of this result and there are tears in the crowd.

It's a scene of contrasting emotions.

Barcelona wrap up the league with four games to go.

And they're still unbeaten. Remarkable.

BARCELONA ARE CHAMPIONS OF SPAIN.

Two minutes of additional time.

The party is under way in the Barca end.

Gerard Pique is unmarked in Deportivo's six yard box.

Is this number five?

Saved.

Here he comes...

National treasure Andres Iniesta is sent on for the final moments.

The whole of the ground rises to give him a welcome fit for a king.

Deportivo give the ball away in a dangerous position. Lionel Messi pounces on it but his shot is charged down.

Another classy move and Luis Suarez is in on goal. Is this the winner? Saved by the keeper.

Paulinho is on for the closing stages. Deportivo have yet to make a change.

Barcelona are 15 minutes or so away from another La Liga title but Deportivo are out to spoil the fun. Great display by the hosts.

Big chance for Barca.

Luis Suarez twists and turns before pulling the trigger.

Side-netting!

Barca are rattled! I repeat. Barca are...

Carnage inside the penalty area as the leaders desperately try to scramble the ball away.

Another Deportivo corner and Schar heads towards the net forcing ter Stegen to get down quickly.

Barca sub alert!

It's not Iniesta. Instead Denis Suarez is on for the final 20 minutes or so.

Ousmane Dembele has been hooked.