Austin Dillon fastest in first Xfinity practice in Phoenix

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The Dillon brothers swept the top spots in the first of two Xfinity Series practice sessions at Phoenix International Raceway.

Austin Dillon topped the speed chart at 136.018 mph while younger brother Ty Dillon peaked at 135.542 mph.

Filling out the top five was Chase Elliott (135.105), Erik Jones (134.690) and Kyle Busch (134.013).

The practice session was red flagged about three minutes from its conclusion when Daniel Suarez spun out of Turn 4. The rookie driver managed to keep his No. 18 from suffering major damage.

Speed Chart

Xfinity practice 1