By Sean Walsh & Graeme Bailey Tottenham Hotspur are continuing their late transfer window activity with a focus on the right-back position, sources have told 90min. Spurs are still locked in talks with Sporting CP over a deal for Pedro Porro after negotiations hit a stumbling block on Monday morning. 90min reported that while a deal looked close to being agreed over the weekend, the Portuguese side refuted such claims, and the two parties remain in discussions. Porro wants to move to Tottenham and was granted permission to miss training on Monday. Reports in Portugal suggest this was in order …