Sunderland are experiencing striker troubles once again this summer. Sporting director Kristjaan Speakman has now had several transfer windows to alleviate Sunderland’s striker woes. And he’s had ample time this summer. But with two weeks left in the summer transfer window, the Black Cats still don’t have a new striker through the Stadium of Light doors. Sunderland have been linked with Alexandre Mendy throughout the summer. Mendy is determined to leave Caen after his impressive 22-goal haul in Ligue 2 last season. But Sunderland and Caen are yet to agree on a price tag for the player, who’s s…