Gyokeres scored a very impressive 97 goals in 102 matches for Sporting Lisbon over the past few years as he established himself as one of the best strikers on the planet.
However, since his move to Arsenal, he has bagged just 10 goals in 29 matches so far. The Swedish striker has struggled in the Premier League and many fans are wondering whether he will survive at the highest level.
Isak and Gyokeres have failed to live up to expectations
This is in contrast with Alexander Isak who scored 54 goals and grabbed 9 assists in the Premier League alone for Newcastle United in just 86 appearances.
Despite this, the 26-year-old has failed to live up to the hype at Liverpool, even if injuries have hindered him.
Speaking this week, Murphy gave his opinion on the pair who are often touted as two of the worst strikers in the English top flight.
"I wouldn’t say he’s (Gyokeres) been a disaster - he’s done okay - but I think Arsenal fans expected a lot more.
"I think there’s probably disappointment behind Gyokeres for Arsenal in terms of the expectation that was there for him to be the missing piece.
"Well, Isak, for obvious reasons," Murphy said when questioned on who hadn't impressed.
"I know he had a slow start and then the injury, but if you take away the injury... When you’re spending that type of money, as Liverpool fans know, you want them to hit the ground running; you don’t want to be patient."
"‘Let down’ is the wrong word. I’d say they feel disappointed in what they’ve been given back."
Isak remains sidelined for now but Gyokeres faces Leeds United this weekend and the question is whether he will start over Gabriel Jesus who has gathered form in recent months as Mikel Arteta makes his decision.