Frank Lampard has pledged not to take offence at any managerial run-ins with Jose Mourinho.

Chelsea manager Lampard will go up against his former Blues boss and current Tottenham head coach Mourinho in Sunday’s Premier League London derby at Stamford Bridge.

The two London bosses have already butted heads several times in their latest roles, but Lampard insisted any friction is merely par for the course in their trade.

“And for all of us the game is so reactionary at the moment, particularly in the modern era with social media reactions, that form will always be judged very harshly, for any manager.

“But they are in good form, on a good run, with good players and a good manager, and it will be a very difficult game for us.”

Sunday’s Spurs clash will be the 1,000th match of Roman Abramovich’s tenure as Chelsea owner.

Lampard hailed the Chelsea chief’s wide-ranging impact on both his own career and the fortunes of the west London club.

“As manager and a player involved in a lot of those games I can give him a huge thank you because nothing we have achieved in that era could have happened without him and his support,” said Lampard.

“When you’re talking about firstly of course a financial input, but also the development of the training ground, the love and time put into the academy, and the trophies we’ve been able to win, they’ve obviously all been made possible because of him.

“So we’re very thankful, I certainly am, our end of the bargain now is to try to work to remain successful on the pitch.”