By ROB HARRIS
AP Global Soccer Writer
LONDON (AP) — Karim Benzema now has back-to-back hat tricks in the Champions League. A treble against holder Chelsea gave Real Madrid a 3-1 victory in the first leg of their quarterfinals. It’s now 37 goals in 36 games this season for the 32-year-old Frenchman, including the three that turned around the last-16 meeting against Paris Saint-Germain to complete a comeback. Chelsea’s only goal came when trailing 2-0 with Kai Havertz netting before halftime. But a minute into the second half, Chelsea’s slack defending allowed Benzema to nip in and score his third into an unguarded net.