Speaking on Saturday, the teenager said: "I made it a priority, I made it very, very clear to every single person in my team that I was not going to cancel one training session or practice session for any off-court commitments. Porteous, 22, is a direct replacement for Scott McTominay, who has not recovered from illness which ruled the Manchester United player out of Scotland's2-0 victory away to Moldovaon Friday.Scotland squad update:IN: Ryan Porteous.OUT: Scott McTominay.pic.twitter.com/mTrVGPW6wA "So that shows you how much of an improvement he's made. I knew he was good, but to be top 20 in the world and pushing for a spot in the tour finals is an incredible effort." Please use Chrome browser for a more accessible video player