Sunderland face fierce competition in their pursuit of a 28-year-old attacker. Sunderland face a huge fight to find a proven goalscorer this month, with the club not no longer prepared to rely on the likes of Nazariy Rusyn and Mason Burstow. The Black Cats remain in pursuit of Bournemouth’s Kieffer Moore, but another name that has been mentioned is Sam Gallagher. It was reported earlier this week that the Blackburn Rovers forward is one of a number of names on Sunderland’s shortlist, having made only two starts in the Championship this season. Gallagher joined Blackburn from Southampton in 201…