The Portuguese driver took his second win on-the-road of the season in Germany, after additionally profitable in Misano earlier than he was disqualified because of a technical infringement, having led nearly all of the race.
Cassidy, who took victory within the opening race on the Tempelhof Airport circuit on Saturday, completed second on Sunday having snatched the place away from Nissan’s Oliver Rowland with two laps to go.
Polesitter Jake Dennis initially held the lead off the road however into the fast-sweeping left of Flip 1, fellow front-row starter Cassidy pulled forward and led the race over the opening three laps.
On the earliest alternative, Cassidy took his first of two Assault Modes, the entire period simply 4 minutes for the second race of the weekend as all drivers outdoors the highest 10 additionally took the identical technique.
Whereas occasions remained frenetic as a result of peloton type of racing, sustaining some semblance of observe place was noticeably extra essential within the sequel with the Porsche, Jaguar and Andretti machines occupying the main positions.
As within the prequel, Maximilian Guenther discovered himself within the wall on lap 11 having been hit into Flip 2 which lodged his entrance wing beneath the Maserati MSG automotive.
Regardless of Guenther rejoining earlier than finally retiring, a three-lap security automotive was deployed with racing again underway on lap 14.
Picture by: Andrew Ferraro / Motorsport Images
Cassidy notably made a transfer to the entrance of the pack two laps later, having handed Evans and Wehrlein into the triple left-hand bends to finish the lap earlier than surging previous da Costa into Flip 1.
The Kiwi held place on the entrance for 4 laps earlier than da Costa moved again forward on lap 21, the place he remained for a big portion of the race.
He solely conceded the result in Mitch Evans, who, like within the first race in Berlin, was one of many final drivers to take his closing Assault Mode.
This he did on lap 36 of 41, the entire period prolonged by three laps as a result of two security automotive intervals.
The second had occurred on lap 25 when Norman Nato and Sacha Fenestraz collided into Flip 3, with the latter eradicated and the previous handed a 10-second penalty.
As Evans took his second Assault Mode he rejoined battling Cassidy over third, which price the Kiwi pairing useful time of their makes an attempt to chase down Rowland and da Costa forward.
Cassidy surged into third 4 laps from the top across the outdoors into Flip 6/7 on Evans, and picked the identical spot to maneuver forward of Rowland a lap later.
Picture by: Dom Romney / Motorsport Images
However by now da Costa had constructed a lead of just about one second, a bonus he managed till the chequered flag as he completed 0.691s forward of Cassidy, with Rowland an additional two seconds adrift.
Behind the highest three, Evans misplaced any likelihood of a podium after working broad at Flip 6, which allowed Pascal Wehrlein and Dennis to maneuver forward.
The Porsche and Andretti driver finally completed fourth and fifth having battled exhausting all through and which concerned a number of moments of contact.
Evans completed sixth forward of Maserati MSG’s Jehan Daruvala and Taylor Barnard, the McLaren driver scoring his second factors end of the weekend having moved as excessive as sixth at one stage.
Envision’s Joel Eriksson secured ninth, whereas podium finisher on Saturday, Jean-Eric Vergne, claimed the ultimate level in tenth having been one of many final runners to make use of each Assault Modes.