Miami face the Raiders at sold - out Wembley on Sunday but Tannehill is warning against overconfidence despite their opponents ' winless start to the season .
The Raiders are another team to have fallen on hard times after winning the hearts of UK supporters in the 1980s .
Miami face the Raiders , another team to have fallen on hard times after winning the hearts of UK supporters in the 1980s , at sold - out Wembley on Sunday but Tannehill is warning against overconfidence despite their opponents ' winless start to the season .