Emi Martinez is poised to join Chelsea from Aston Villa for £7.5million – the fourth deal involving the clubs this summer.The Argentina goalkeeper has been surplus to requirements at Villa Park since the club signed Zion Suzuki from Parma earlier this month.It means Martinez, Lucas Digne, Ollie Watkins and Youri Tielemans should all have left by the end of the transfer window – and they were four of Villa’s highest earners.That creates space in the wage bill for Nicolas Jackson, Leon Goretzka and – perhaps – Rafael Leao.Villa’s financial offer to Leao is considerably lower than that offered by Galatasaray, but Villa hope the chance to play in the Premier League will sway it for the AC Milan forward. Emi Martinez is poised to join Chelsea from Aston Villa for £7.5million – the fourth deal involving the clubs this summerMartinez saw a move to Juventus collapse earlier this month despite an initial £6million offer, with Unai Emery happy to press ahead with Suzuki and Marco Bizot as his goalkeeping options.Earlier in the summer, Chelsea boss Xabi Alonso indicated he was happy with keepers Robert Sanchez and Mike Penders.But Sanchez’s shaky display in Chelsea’s 3-2 win at Fulham raised more question marks about the Spaniard.Asked about Sanchez on Wednesday, Alonso said: ‘Normal conversations. We have talked more about the team thing, about what we did well and what we have to do better. It was more about understanding the context.’Every game is going to be important because we are in this process that we still need to develop things, we need to make adjustments that are more team-related.’