David Ferrer retires after Alexander Zverev defeat at Madrid Open
Ferrer finished his 20-year career with 27 singles titles; fifth-best among active players behind the top four of Roger Federer, Rafael Nada
Barcelona Open: Rafael Nadal beats David Ferrer with improved display
Eleven-time champion Rafael Nadal gave a much improved performance to beat David Ferrer 6-3 6-3 and reach the quarter-finals of the Barcelon
