Bolton have completed the signing of left-back Marcos Alonso from Real Madrid for an undisclosed fee.
The 19-year-old becomes Trotters boss Owen Coyle's third signing of the summer following the arrivals of Martin Petrov and Robbie Blake.
Alonso joins on a three-year deal, with the highly-rated defender set to compete with Paul Robinson and Jlloyd Samuel for a place in the starting line-up.