Manchester United should focus on pursuing the services of Lille striker Jonathan David when the transfer window reopens in the New Year. The Red Devils currently have three senior strikers in the first-team squad in Marcus Rashford, Anthony Martial and Cristiano Ronaldo. Among them, only Rashford has been a regular starter in the top-flight. Martial has spent most of the time on the sidelines with injuries. Ronaldo has seen consistent playing time in the Europa League, but there remains the speculation that he could leave at the turn of the year.