The 28-year-old spent three seasons with West Brom, featuring during their relegation season in 2008/09. Then the club's record transfer fee, Valero proved to be a flop, and spent the next two campaigns back in Spain with Mallorca and Villarreal. But City, Spurs and Arsenal are all reportedly tracking the midfielder, potentially ready to offer him a route back into the English top flight.
West Brom eventually cut their losses in 2011, and he joined Villarreal permanently. But following Villarreal's relegation last season the Spaniard was snapped up by Fiorentina.
He's shone in Serie 'A' to such an extent that Arsenal, Spurs and City have all sent scouts to watch him in action.
Reports in Italy claim that the Premier League trio could all be interested in making summer moves for the Spanish midfielder - who's missed just one league match so far this season.
Fiorentina have impressed in the Italian top flight, and currently sit fourth in the table.
A huge reason for their success has been the form of their talented trio of midfielders - Valero, Alberto Aquilani and David Pizarro.
All three have spent time in the Premier League with little success - Pizarro at Manchester City on loan and Aquilani famously with Liverpool.
Valero leads the club's assist charts with ten so far this season - only Francesco Totti and Marek Hamsik have more in the league so far.