Exeter captain Dean Mumm says the next three Premiership games will be a true test of how well his side have done.
Third-placed Chiefs next go to leaders Northampton before hosting fifth-placed Wasps and Saracens, who are second.
"It's been a good start to the season, but the next three games are a real litmus test as to where we are," Mumm said ahead of Friday's trip to Saints.
"We come up against three of the top six sides in the Premiership, which is the focus for us this year."
The former Australia international forward added to BBC Radio Devon: "At this stage we've still got a lot to prove in the Premiership and on all fronts."
Exeter go into the Northampton game after three wins from four games in the European Challenge Cup and LV= Cup, where a first-choice Exeter side beat local rivals Bath on Saturday.
"Winning against Bath, regardless of what competition and in what context, is always very important for us and for our fans, we take pride in those matches and we were very pleased with last week's result," Mumm , who has yet to play in the Premiership this season after having
"It's a massive game for us against Northampton and a huge challenge.
"They've been fairly impressive across all competitions this year, the depth of their squad and the quality of their team as a whole means there's no easy game against them particularly at Franklin's Gardens.
"It's a tough game for us, but one I'm personally looking forward to."