Arsenal increased the pressure on Sunderland manager David Moyes with a comfortable victory over a Black Cats side who remain bottom of the table and without a Premier League win this season. Alexis Sanchez put the Gunners ahead when he got in front of defender Lamine Kone to head in Alex Oxlade-Chamberlain's cross. The dominant visitors had a strong penalty appeal turned down after Sanchez looked to have been brought down before Jermain Defoe equalised from the spot after keeper Petr Cech had fouled Duncan Watmore.