Daniel Ricciardo knows that Liam Lawson may replace him at RB after the Singapore Grand Prix. There are strong rumours that a driver change is imminent at the Red Bull junior team. The reason for the potential early change is unclear. Ralf Schumacher says a clause in Liam Lawson’s contract has forced Red Bull’s hand. Ricciardo’s performances have been underwhelming, but not to the same extent as other drivers who have lost their seat mid-season. The Australian has outqualified teammate Yuki Tsunoda in four of the last seven races, and finished ahead in five (where both have been classified). H…