Barca join running in race for in-demand French starlet.
The Catalan giants are keen to strengthen at the back after a poor start to the season, and have looked before at bringing in Laporte, who is regarded as one of the best young centre-backs in Europe.
The 21-year-old was targeted by Manchester United, Arsenal and Chelsea at various points in the summer, but has so far remained in the Spanish top flight.
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According to Fichajes.net, that could continue if he makes the move to the Nou Camp this winter, with Barcelona now thought to be stepping up their interest in the France Under-21 international.