Boca Juniors have told Barcelona to get serious if they want to sign Leonardo Balerdi this week.

Barca are pushing to sign the 19 year-old defender before Friday's transfer deadline, though their latest offer of €5.5m has been thrown out by Boca, says AS.

The Argentine giants refuse to do business for less than €10m.

Talks have been ongoing between the two clubs since the Joan Gamper Trophy friendly on August 15.