1 goal every 52 mins: Gunners target superior to Chelsea-linked striker?

Emirates Stadium 2

Arsenal are reportedly reviving their interest in Real Madrid super-sub, who has also been linked to Manchester United.

Arsenal target Alvaro Morata, 21, is responsible for scoring a goal with a greater frequency than Barcelona superstar Lionel Messi, than Real Madrid's Ballon d'Or winner Cristiano Ronaldo and Atletico Madrid's animal of a striker Diego Costa.

Morata came off the bench on April 5, against Real Sociedad, and scored a goal despite only playing the final five minutes. His supersub nature - he scored in the 5-0 destruction of Rayo Vallecano on March 29 having only played 18 minutes - means he has an attacking efficiency of a goal scored every 52 minutes he is on a La Liga field, on average.

This is a superior return than Messi (one goal every 79 minutes on average), Ronaldo (85 minutes) and Chelsea target Costa (103 minutes).

According to a recent report in The Mirror, Real Madrid would allow Morata to leave Estadio Santiago Bernabeu providing Arsenal paid £8m for the Spaniard's services, however, the deal could only be complete if a clause was embedded in the deal - that Real could buy the player back at a certain fee in two years.

Arsenal have long been linked with Morata, however, reports over the past month also suggest Manchester United are interested in the player.

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