Northern Ireland failed to build from their 2-0 win against Luxembourg with a surprise defeat away to Bulgaria, with Liverpool’s Conor Bradley again featuring. Manager Michael O’Neil was full of praise for Bradley after last week’s result in the UEFA Nations League, with the Liverpool youngster showing for Northern Ireland why he is one of the most exciting prospects in the Premier League. However, last night in Plovdiv was a different story for Bradley as Northern Ireland were beaten 1-0 by Bulgaria in a result that caught many by surprise, with the right-back also picking up a booking in the…