"It is time to move on", said Zabaleta, who said he plans to play for two more years before retiring to his wife's home city of Barcelona.
After the final whistle, Zabaleta reflected on his best memories of being at City. Guardiola wanted to see a better pressing game from Aguero, more teamwork and link-up play, a better work ethic.
Pep Guardiola kept the media waiting on Tuesday night after failing to appear for his post-match press conference until well after 11pm, but when the Manchester City manager arrived he had the ideal excuse for his lateness after the victory over West Bromwich Albion.
But, despite the massive investment, City is clinging to fourth place in the Premier League heading into the final week of the season; Arsenal is three points behind with two games remaining.
"Gabriel was unbelievable but I have to say, I think the key player up front was Sergio", Guardiola added.More news: Newborn found with 100 rodent bites; parents arrested
It has already been confirmed that Zabaleta - one of City's most popular players - will be leaving City after nine years, and he came on for the final half hour.
Gabriel Jesus, Kevin De Bruyne and Yaya Toure netted as Manchester City enjoyed a 3-1 win over West Brom to leave themselves one win away from finishing third. "Now we are there every year, but we have to try and be better next season".
"When I first came to Manchester I felt like when I was in Barcelona at Espanyol, we were not the main club in the city - we can't say the same thing now", Zabaleta said. Man. City are just one point behind the Reds with the chance to go two points up if they beat West Brom tonight at Manchester Stadium. If not, they don't give you a second chance.
"I don't think we've shot ourselves in the foot in respect of not trying", said manager Tony Pulis. "When they got the third you are sitting there thinking we are staring down the barrel here at a hatful of goals, but the lads really showed a lot of character the last 20-25 minutes".
Wenger's latest contract is up at the end of this season, and failing to reach the Champions League could yet sway his decision about whether to stay on. When he gets the ball, you don't know what he is capable of doing - we saw that on Tuesday night.