Arsenal’s title chances were dealt a significant blow after a narrow defeat at the hands of Chelsea. Alyssa Thompson’s first-half finish was the difference on a competitive afternoon at Stamford Bridge but one that ultimately left Renée Slegers with more questions than answers about how to save their season. “Worried? No,” Slegers said. “Confidence is something that fluctuates. They know who they are and they know what they can bring. What’s important is that there’s always phases in the season…