Bautista, who was more than six tenths down on expected 2022 title rivals Rea and Toprak Razgatlioglu during day-one, posted a solid time of 1:50.097s to go quickest in FP4. 

Rea managed to pit Garrett Gerloff to second, with the latter continuing to impress ahead of what’s a big 2022 season. 

An eight-time winner around the MotorLand Aragon Circuit, Rea set a time quicker than the official race lap record on Monday, as did reigning world champion Razgatlioglu. 

The Pata Yamaha rider started day-two with a sixth place finish - eight tenths down on the Ducati rider. 

World Superbike Test Aragon, Spain - Free Practice 4 Results
1Alvaro BautistaSPAAruba.It Racing Ducati1:50.097s
2Jonathan ReaGBRKawasaki Racing Team WorldSBK+0.274s
3Garrett GerloffUSAGRT Yamaha WorldSBK Team+0.429s
4Alex LowesGBRKawasaki Racing Team WorldSBK+0.509s
5Michael RinaldiITAAruba.It Racing Ducati+0.632s
6Toprak RazgatliogluTURPATA Yamaha with Brixx WorldSBK+0.855s
7Andrea LocatelliITAPATA Yamaha with Brixx WorldSBK+1.134s
8Philipp OettlGERGoEleven Ducati+1.254s
9Loris BazFRABonovo Action BMW+1.517s
10Lucas MahiasFRAPuccetti Kawasaki+1.691s
11Axel BassaniITAMotocorsa Ducati+1.708s
12Scott ReddingGBRBMW Motorrad WorldSBK Team+1.785s
13Eugene LavertyIRLBonovo Action BMW+1.810s
14Kohta NozaneJPNGRT Yamaha+1.993s
15Ilya MikhalchikUKRBMW Motorrad WorldSBK Team+2.264s
16Roberto TamburiniITAMotoxracing Yamaha WorldSBK Team+2.627s
17Leandro MercadoARGMIE Honda Racing+2.949s
18Hafizh SyahrinMALMIE Honda Racing+3.648s
19Oliver KonigCZEOrelac Racing Kawasaki+4.258s
20Loris CressonBELPedercini Kawasaki+4.427s
21Gabriele RuiuITABmax Racing+4.897s

While Ducati, Kawasaki and Yamaha continue to look strong, BMW’s struggles are seemingly continuing as Scott Redding could only manage P12. 

For the second time in as many sessions, Loris Baz was the top BMW rider in ninth, however, the Frenchman was also over a second down on Bautista. 

Replaced once again by Ukrainian rider Ilya Michalchik, Michael Van Der Mark has officially been ruled out of this weekend’s season-opener. 

Van Der Mark, who suffered a recent mountain bike accident, said: "It has been a difficult decision but unfortunately I will not try to ride at MotorLand Aragón. 

"At this moment we have to be smart and stay calm because this is the only way forward in my recovery. 

"I really miss working with the team and riding my BMW M 1000 RR but right now my goal is to be fit again as soon as possible."

More results to follow from the final day of pre-season WorldSBK testing.