Arsenal manager Arsène Wenger close to completing £14m capture of Luiz Gustavo from Bayern Munich Wenger admitted after Arsenal's 3-1 win over Manchester City on Saturday that he felt his squad was "a little bit thin" and he has still not given up on signing Liverpool striker Luis Suárez. A final bid approaching £50 million is expected for Suárez but Arsenal are also taking a renewed interest in Wayne Rooney's situation following Chelsea's failure to complete a deal. Wenger is under pressure to spend big this summer and still has a transfer budget of around £70 million at his disposal. Arsenal thought that they had sealed a £23 million deal earlier in the summer for Real Madrid's Gonzalo Higuaín but Napoli were eventually prepared to go to £31 million. Yaya Sanogo, a 20-year-old free transfer from Auxerre, has been Arsenal's only signing so far this summer. As well as a proven striker, Wenger wants to add another right-sided defender. Gustavo has the versatility to play at centre-back and Wenger also regards Bacary Sagna as an increasingly plausible option in that position. Sagna will still probably start the season at right-back but, with only one year remaining on his contract, Arsenal would like further competition alongside Carl Jenkinson. Having finished last season so strongly, Wenger is taking confidence from not being in danger of losing any of his key players for the first time in three summers. "I am an optimist," he said. That's why I do this job. We have kept the squad together for the first time in many years so I am happy.