Arsene Wenger's side took the lead after 20 minutes, Lacazette heading in after goalkeeper Ben Foster had pushed Alexis Sanchez's free-kick on to the bar. The goal meant that the close season signing from Lyon became the first Arsenal player to score in his opening three home fixtures in the league since 1988. The Frenchman scored his fourth of the season and Arsenal's second of the match from the penalty spot, midway through the second half, after a clumsy barge on Aaron Ramsey in the box by Allan Nyom.
Penalty!?The referee says no as Jay Rodriguez is tackled from behind by Shkodran Mustafi. Arsenal 0-0 #WBA ➡ https://t.co/LPAIFwSaHp pic.twitter.com/nArJhurwOo — BBC Sport (@BBCSport) September 25, 2017
After the final whistle, Welshman Ramsey was full of praise for his new free-scoring team mate. "Lacazette is fantastic. He has lovely touches and knows where the back of the net is," he said.
Home sweet home for Lacazette! ? 3 games, 3 wins, 4 goals at Arsenal Stadium ⚽️ pic.twitter.com/m1KOHNq41USeptember 25, 2017
Happy with how your team did? pic.twitter.com/7xQMEeYt4S— Premier League (@premierleague) September 26, 2017
RESULT Arsenal 2 (Lacazette 20, 67-pen) West Brom 0
Six matches in... pic.twitter.com/QG6TdJ9w1q— Premier League (@premierleague) September 26, 2017