What is the fine-grained topic of the following text: Of the top six sides, only Arsenal and Tottenham Hotspurs won; the former needing Gabonese forward Pierre-Emerick Aubameyang’s penalty deep into the second half to break the deadlock before sealing a 2-1 win over relegation strugglers Cardiff City who still have to deal with the unexpected and particularly tragic demise of Emiliano Sala, the Argentine forward whom Neil Warnock had so much trust in to turn their season around. Only return the topic.
Arsenal and Tottenham Hotspurs' recent wins in football and the impact of Emiliano Sala's demise on Cardiff City.