David Moyes was frustrated to have conceded from two headers in Sunderland's 4-1 home defeat to Arsenal.
Sunderland boss David Moyes questioned his side's defending from crosses as they suffered a 4-1 home defeat to Arsenal on Saturday.
Two goals each from Olivier Giroud and Alexis Sanchez secured maximum points for the Gunners and condemned Sunderland to an eighth defeat in 10 Premier League matches.
Moyes' side have now endured the worst start of any team in the Premier League era, with two points and a goal difference of -13 this season.
But it was the manner in which his side conceded headers from Sanchez and Giroud that frustrated Moyes the most, especially since Jermain Defoe had levelled the scores at 1-1 with a penalty in the second half.