LONDON (Reuters) -Pierre-Emerick Aubameyang started his season with a hat-trick as Arsenal shook off their Premier League troubles and hit second tier West Bromwich Albion for six to reach the third round of the League Cup on Wednesday.

Southampton went two goals better, dealing fourth tier Newport County an 8-0 drubbing at the Rodney Parade ground in the South Coast side's biggest away win of their 136-year history.