BARCELONA: Premier League heavyweights Liverpool, Arsenal and Chelsea clash this week with an unlikely thread linking them – the men in charge all hail from the small Basque province of Gipuzkoa.

Andoni Iraola's Liverpool host Xabi Alonso's Chelsea in the League Cup on Wednesday, and then Mikel Arteta's English champions Arsenal on Sunday 1 in the Premier League

Unai Emery, a fourth Premier League coach from Gipuzkoa, takes Aston Villa to face giants Barcelona on November 3 in the Champions League.

So how did Spain's smallest province, of just 1,980 square kilometres (765 square miles), with a population of around 730,000, produce 20 percent of the Premier League's coaches?