Arsenal defender Hector Bellerin is unsettled at the Emirates after Manchester City's ongoing pursuit of the right-back. The 21-year-old is a summer transfer target for the Citizens manager Pep Guardiola, who is looking to strengthening his side's back four for the 2016/17 season.

According to the Mirror, the situation has left the Gunners fuming at the club and City's director of football Txiki Begiristain. The Spain international was one of the standout players at Arsenal in the previous campaign.

Bellerin started in 36 league matches last term, scoring one goal and setting up five more for his teammates. He became a first team regular in the 2014/15 season and was wanted by Barcelona last summer.

The Catalan club were looking at the Spaniard this summer, who spent eight years at Barcelona's youth academy. The La Liga winners' approach was turned down by the Gunners as he remains a key part of Arsene Wenger's plans at the club.

His current deal at Arsenal runs down in 2019 and the Frenchman wanted to hand Bellerin an improved contract as a reward for his impressive display. However, City's latest approach has complicated the negotiations and the talks have stalled.

City youngsters Erik Sarmiento and Paolo Fernandes are managed by Albert Botines, who is also Bellerin's agent. Due to this, both Guardiola and Begiristain know the full-back's representative, who is valued around £43.1m ($57m), according to the Evening Standard.

The former Barcelona and Bayern Munich manager has Bacary Sagna and Pablo Zabaleta as the two right-backs in the squad. The 33-year-old France international left the Emirates as a free agent to join City in 2014, while Zabaleta's form dipped last season and is attracting interest from Italy.

Guardiola is aware that both of his right-backs are above 30 and is looking to bring in a player to strengthen that position. Bellerin fits the Spanish manager's requirements, but will have to fight with Arsenal for his signature as Wenger aims to tie down his player to a new deal.