The 66-year-old boss suggested the fixture list was to blame for the Gunners fading in the second half.
Diaz and McGregor were originally scheduled to clash on 9 July in Las Vegas.
The Mackems moved out of the relegation zone with a goalless draw against the Gunners.
The 31-year-old produced a stunning performance to win on the streets of London.
Mamadou Sakho could be unavailable for over a year should he be found guilty.
Kings XI Punjab face Mumbai Indians in the IPL 2016 clash on Monday. Find out how to follow the match live.
The 34-year-old star produced another emphatic performance to extend his unblemished record.
Tendulkar is the highest run-scorer in Tests and ODI cricket history.
Major Tim Peake is giving up the best seat in the universe to take part in the 26.2 mile race.
Kolkata backed to continue winning run against struggling Pune.
Virat Kohli's Bangalore side backed to win at Rajkot.
Sunderland host Arsenal in the Premier League on 24 April. Find out where to watch live in the UK.
Valentino Rossi starts the 2016 Spanish Grand Prix in pole position. Find out how to follow the race live in the UK.
Nadal takes on Nishikori in the final of the Barcelona Open. Find out where to watch live in the UK.
Theo Walcott's last start in the Premier League was against Manchester United on 28 February.
Gujarat Lions host Royal Challengers Bangalore on 24 April. Find out where to watch live on TV and online.
Arsenal suffered back-to-back defeats at the hands of Manchester United and Swansea City in the Premier League.
Crystal Palace face Watford in the FA Cup semi-final clash on Sunday. Find out how to follow the match in the UK.
Van Gaal believes Taylor "changed" the tie despite agreeing with second half penalty decision.
Martinez remains committed to delivering silverware after second semi-final defeat of the season.
Martial nets in the final minute of added-on time to stun the Toffees at Wembley.
The 35-year-old midfielder thinks this season has been a 'freak' and will not be repeated.
N'Golo Kante is a rumoured target for both Arsenal and Tottenham Hotspur.
Jonathan Nicola says he escaped war-torn South Sudan as a teen and now faces deportation.
Alexis Sanchez and Mesut Ozil have two years left on their Arsenal contract.
Anthony Martial's late goal seals United's place in the FA Cup final next month.
The 26-year-old player has made 22 Premier League appearances this season.
Mesut Ozil has not made it into the PFA Team of the Year.
The Magpies came from two goals behind to earn a draw at Anfield.
Manchester United face Everton in the semi-finals of the FA Cup as they battle City and Arsenal for a place in the top four.