By Katie Catherall Pep Guardiola has fired a dig at Manchester United-bound Ruben Amorim after facing a miserable 4-1 defeat to Sporting CP in the Champions League. The Catalan boss was delivered his first taste of Amorim’s new-look United when his side failed to impress against the Portuguese coach’s tactics in a tough European clash midweek. Usual stars such as Erling Haaland and Matheus Nunes were subject to criticism after Tuesday’s disappointing defeat – with the former failing to score a spot kick to gift his side a lifeline. It marked the third successive defeat for City, with loses to …