Middlesbrough-Manchester United Preview (The Associated Press)

Regardless of club or status, the fortunes of players rise and fall in the Premier League, sometimes with startling speed as a season unfolds. Such is the case at Manchester United, who are watching summer signing Henrikh Mkhitaryan develop before their eyes as one-time teenage starlet Anthony Martial simply watches from the bench heading into Friday's match against Middlesbrough at Old Trafford. Far and away the best player at the international level for Armenia and a key contributor to Borussia Dortmund's rise in the Bundesliga before making the jump to the English top flight for a reported £26.3 million transfer fee, Mkhitaryan struggled in his transition to the rough-and-tumble world of Premier League midfields.