The chants of "boring, boring Chelsea" may have rung around the Emirates Stadium on Sunday after the Blues ground out a 0-0 draw against Arsenal, but the Blues won't care one jot as they moved a step closer to securing the Premier League title. But what else did we learn from the match?

1. Wenger's unwanted record continues but there are reasons to be cheerful

Arsene Wenger has still not recorded a single victory over a team managed by Jose Mourinho then, and while the long-serving Arsenal manager would have been disappointed that his side couldn't break the duck, there was still much to be positive about. The Gunners played with great confidence and purpose, and had the better chances in the game - Danny Welbeck came agonisingly close to snatching the winner at the death but couldn't connect with the ball. A second-placed finish in the Premier League and a second FA Cup win in a row would surely constitute a successul season for the North London side; perhaps Wenger has regained his winning touch and will finally get one over his Portuguese adversary next season.

2. Mourinho the master of big-game planning

Make no mistake; Jose Mourinho's Chelsea are not boring, they are brilliantly savvy and professional. One of the many reasons why the Portuguese manager is arguably the best in the business is that he knows that when it comes to the big games, the priority is always to ensure that his sides do not lose. Anything else is a bonus. The elated reaction from the Chelsea players at the final whistle showed just how much this well-earned 0-0 draw meant to them, and it is because they adopt a 'defence first' approach that the Blues are almost certain to be crowned Premier League champions at the end of the season. Jose's managerial rivals in the top flight - especially those who always seem to come short in the big games of the season - could certainly learn something from the master.

3. Refereeing blunders increases calls for changes in the game

Michael Oliver had a difficult afternoon officiating this game, to be brutally honest. Four credible penalty appeals - including a full-on takedown by David Ospina on Oscar - were all turned down, and the man in black would have been relieved that the second half went by relatively incident-free. Is it time for further measures to be introduced in football so that clear refereeing mistakes can be rectified? These could come in the form of a limited number of challenges given to each manager in a game, video technology to review contentious decisions, or perhaps even post-match interviews with the officials so they can explain their decisions.