Partey joined the Gunners last year from Spanish side Atletico Madrid in a deal estimated to be worth £45 million.
He, however, battled a series of niggling injuries last season, which limited his game time for the North London outfit.
This season, though, Partey has been one of Arsenal’s best performers, although his performances have dipped in recent weeks.
The Ghanaian was not at his best during last week’s 3-2 defeat to Manchester United and again failed to shine in Arsenal’s 2-1 loss to Everton on Monday.
Speaking about his 18-month stay with the Gunners, Partey said he would rate his overall performance at four out of 10.
"I give myself four [out of 10], because there are moments I can really hurt the other team but there are also moments where I allow myself to lose focus and that's when everything goes down,” he told Sky Sports.
"This is when you realise that you have to get better…. From the start [of the Manchester United game] I had a couple of moments where I gave two balls away and someone watching on TV from home or in the stadium, it is normal that they see this.
"At the end, I have to be happy with some moments, I have to learn from the bad parts and try to do better. I think they demanded more and personally I know I can give more. I have to keep working and at the end I will get the results."
Partey has played 12 matches for Mikel Arteta’s side in all competitions this season, scoring one goal.