A Swede deal: Arsenal signs Gyokeres

Sporting Lisbon goal machine will be key to Gunners' title hopes next season

Arsenal on Saturday announced the signing of Swedish international striker Viktor Gyokeres from Sporting Lisbon, bolstering its attacking options as it attempts to challenge for the Premier League title.

The 27-year-old, who fired Sporting to the Portuguese title last season with 39 goals and netted a Champions League hat-trick against Manchester City, is reported to have signed a five-year deal in a transfer worth an initial 57.4 million pounds ($77.2 million).

Gyokeres' transfer, which could end up costing the north London club as much as 66.4 million pounds with performance-related add-ons, takes Arsenal's close-season spending to the region of 200 million.