Guimaraes was handed only his fourth start in the Premier League this season following his £75 million move from Newcastle United in the summer transfer window.
But the Brazil international delivered an impressive performance alongside Declan Rice at the heart of Arsenal’s midfield.
‘He’s much better, he had a massive impact, he’s hitting serious levels now, but we can still take him to another level,’ Arteta said after the win over Hull City.
‘That’s my conviction, I told him that in the dressing room – he owned a lot of moments in the game but there is still much more to come.’
Martin Odegaard’s goal sealed Arsenal’s 1-0 win over Hull City (Getty)
Arteta also praised Noni Madueke for another lively performance on Arsenal’s right flank in the absence of Bukayo Saka.
‘That’s the second part of the story – the first is that you need to earn the right to be able to do that,’ Arteta said.
‘Noni did that, he reacted to not playing often, went away, started to train and was a different Noni.
‘He wasn’t going to accept that situation, he meant business, and since then he has been incredible. Now you are in that position, he needs to hone and improve it, so let’s see if he can do that.’
