Toto Wolff says it can only take 'one bad weekend' to have a big effect on the Formula 1 World Championship as he warns against Mercedes letting up in its continued dominance of the sport.

Following its dismal race day in Hungary, Mercedes struck back in typically comprehensive style in the Belgian Grand Prix with a clear 1-2 in the race, as it became the turn of Ferrari to suffer a difficult Sunday afternoon.

Indeed, though the result means Mercedes has multiplied its advantage to a mammoth 184 points now, ahead of the round 12 of 19 and the Italian Grand Prix, Wolff says it isn't a reason for the team to assume the 'battle' is won.

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"It was a fantastic performance from the entire team in Spa. We brought a competitive package to the car, the crew were flawless and both Lewis and Nico produced strong drives. The result was particularly satisfying after an eventful day on Friday, where the team did well to react to a challenging situation.

"A positive weekend meant that we left Belgium with our Championship position significantly strengthened - but the fortunes of our rivals also played a part in that and the outcome of the race overall was a reminder that nothing can be taken for granted.

"Top results in this sport are far more easily lost than gained - and one bad weekend can produce a big swing in points. We can be proud of what we have achieved so far this season but the battle is by no means won."

Ferrari tough race day in Belgium also had the effect of allowing Lewis Hamilton and Nico Rosberg to firm up what appears to be a likely inter-team battle for the title now, with Sebastian Vettel now 67 points shy of the top spot.