Arsenal are reportedly viewed by rival clubs as the leading favourite to sign a £55m-rated attacker this summer. The Gunners are set for a big transfer window with Mikel Arteta intent on improving his Arsenal squad to such a degree that they can overtake Manchester City next season in the Premier League title race. A midfielder and striker have been earmarked as the two main priorities for Arsenal in the market, with the Gunners also expected to offload quite a few big-name players to help raise funds. And rival teams now seem to think Arsenal are leading the chase for one particular signing. …