Arsenal winger Gabriel Martinelli is an option for Galatasaray if they fail to secure Rafael LeaoMikel Arteta is at the Emirates Stadium with the Gunners. Galatasaray are actively preparing contingency plans in the transfer market, with Arsenal winger Gabriel Martinelli emerging as their top alternative should the Turkish champions fail to land AC Milan star Rafael Leao, according to Gianluca Di Marzio.The Istanbul club have made signing a marquee left-sided attacker a central priority for manager Okan Buruk this summer. While Galatasaray remain firmly in the race for Leao, negotiations have become increasingly complex due to intense competition from rivals Fenerbahce and AC Milans strict 50m valuation.Martinelli, who is a real threat in front of goal, has moved to the top of Galatasarays shortlist as a high-calibre alternative. The Brazil international faces an uncertain future in North London, with Arsenal seeking a marquee left winger.Galatasaray intermediaries have begun preliminary enquiries regarding Martinellis willingness to move to Super Lig football. While Arsenal are not actively pushing the winger out, the clubs hierarchy could be open to substantial offers.For Galatasaray, convincing a player of Martinellis pedigree would represent a major coup. The Turkish champions can offer guaranteed regular minutes, a starring role in their domestic title defence, and Champions League footballfactors that could appeal to the Brazilian as he looks to safeguard his place in the national team.Although securing Leao remains the primary ambition at RAMS Park, the pursuit of Martinelli highlights Galatasarays aggressive approach in the summer window. Should they be priced out of a deal for Leao, the Turkish giants are prepared to redirect their financial resources towards North London and present Arsenal with a formal proposal for Martinelli.