The German has been out of favour so far this season, not making an appearance in any competition and only making it onto the substitute’s bench on three occasions.
It looked like the 27-year-old was certain to leave in the transfer window, with the likes of Tottenham, Paris Saint-Germain and former club Roma interested in his services.
However, he was keen to stay and fight for his place at Stamford Bridge and Lampard is happy to use him, with the centre-back now guaranteed to be at the club until January at least.
The Daily Mail report that there has never been an issue between Lampard and Rudiger personally and after discussions between the two, the Germany international will now be involved more.
The defender was back on the bench as Chelsea drew 0-0 with Manchester United on Saturday and he is likely to be involved as the Blues go to Krasnodar in the Champions League on Wednesday night.
Whether he can break back into the starting XI, though, is yet to be seen as Chelsea appear to have improved at the back in recent games.
After a ropy start to the season at the back, Chelsea have picked up back-to-back clean sheets in draws with Sevilla and the Red Devils.
Edouard Mendy has come into the side as the first choice goalkeeper, improving the situation by ousting the out-of-form Kepa Arrizabalaga.
However, Rudiger would still have to get ahead of the likes of Thiago Silva, Kurt Zouma, Andreas Christensen, Cesar Azpilicueta and Fikayo Tomori who have all played at centre-back so far this season.
Lampard decided he was the centre-back to make way after Silva’s arrival this summer, but without a deal being done, his Chelsea career is not over.