By Jamie Spencer Barcelona’s interest in Tottenham Hotspur left-back Sergio Reguilon has taken the football world by surprise, but it could be an opportune signing for the Catalan giants. Reguilon is not thought to have a future at Spurs, having last played for the club in 2022 and spending the past two years on loan with spells at Atletico Madrid, Manchester United and Brentford. But the 27-year-old has suddenly been linked with Barcelona, following reports of enquiries being made to Tottenham regarding his availability. AS suggests that, unsurprisingly given Barcelona’s financial limitations…