Lewis Hamilton looks set to be recalled as a witness as the Adrian Sutil assault saga rolls on.

German Sutil, and his father Jorge, described former close friend and 2008 world champion Hamilton as a "coward" and "pathetic" after the McLaren driver did not appear at the recent hearings in Munich.

But with the former Force India driver - and Munich prosecutors - now filing appeals against the judge's verdict, Hamilton's personal testimony might be regarded as crucial.

Hamilton is clearly visible in the video footage of the incident with Eric Lux in a Shanghai nightclub last April, but Sutil's manager Manfred Zimmermann claims the judge neglected the gravity of the security camera evidence.

"Not asking one of the witnesses to court and other important circumstances have not been considered as well," Zimmermann charged.

London newspaper the Daily Telegraph claims Hamilton "is happy to testify provided the date does not clash with prior commitments".