Arsenal have signed Christian Norgaard from Brentford, the two Premier League clubs said on Thursday as the North London club continues to strengthen the midfield following close-season departures. Financial details were not disclosed but British media reports said Arsenal paid an initial fee of 10 million pounds ($13.60 million) to sign the 31-year-old Denmark international on a two-year deal with an option for a third year. "He is an international player with a wealth of experience of the