The Spaniard, who signed for the Blues earlier in the week from Liga BBVA giants Barcelona scored one and registered an assist in the first-half at the Hawthorns as the visitors ran out 3-2 winners, despite playing for the majority of the second half with 10-men.
Pedro broke the deadlock after 20 minutes after combining well with Eden Hazard before his effort took a deflection en route to hitting the back of the net.
On the half hour mark he turned provider as his cross-cum-shot was turned home by Diego Costa, which handed the visitors a comfortable lead.
The Baggies twice reduced the two-goal deficit, but couldn’t force an equaliser to ruin Pedro’s day.
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Take a look at a selection of Blues supporters, who have been full of praise for the 28-year-old on Twitter:
Pedro’s Chelsea debut: Goals: 1 Assists: 1 MOTM pic.twitter.com/Xt1JRNSaMP
— FourFourTweet (@FourFourTweet) August 23, 2015
— Top Corner (@HITCtopcorner) August 23, 2015
— Kevin Pietersen (@KP24) August 23, 2015
Pedro’s work rate is exceptional. That chasing/press they imply in you at Barca from them position on winning the ball back. Very cool. #CFC
— Mick Loizou (@MickmarJr) August 23, 2015
Pedro was absolutely brilliant today. I think he’s gonna be premier league’s best signing this season.
— _mr.dee_ (@buoy_deny) August 23, 2015
Pedro… What a player
— I’m monster (@CALLMISEXY__) August 23, 2015
Unbelievable debut for Pedro. A goal and an assist!
— CFCNewsApp (@CFCNewsApp) August 23, 2015