Lowes replaced Leon Haslam inside the works Kawasaki stable this year alongside five-time WSBK champion Rea, and leads the championship after winning the second feature-length race of the season-opening Phillip Island weekend.
Following a hiatus of some five months due to the COVID-19 pandemic, Jerez will play host to the second round of the season this weekend.
Lowes, who is 12 points clear of nearest rival Scott Redding (Ducati), says that he's not suffering from the weight of expectation like his more senior teammate Rea.
"Maybe I should feel some pressure but I don't really feel any pressure at all, to be honest, because we started the year so strong and it was was nice," Lowes told Motorsport.com.
"Obviously, the motivation of believing now that I can challenge to win is great. But I don't really feel any any more pressure to be honest.
"Because it's in our team, the pressure is put [more] on Jonathan than me because, unfortunately for him, being so dominant over the last five years means that unless he's winning, he's disappointed.
"I'm not in the same situation, so I can just ride relaxed and try to do the best I can."
Race winner Alex Lowes, Kawasaki Racing Team
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