The biggest concern surrounds João Pedro, who missed the last league outing after what McFarlane described as "uma pequena pancada". The report says there is no major alarm, but the timing matters.
That makes sense. Final-day football rarely rewards sentiment, and Chelsea need sharp legs as much as big names. If João Pedro is available, he gives them energy, movement and a direct threat in a game that could turn tense quickly.
The situation is not only about the forward line. Colwill and James are also being monitored after missing the win over Tottenham.
McFarlane was careful rather than dramatic: "Temos um pouco de tempo até lá, então estamos esperançosos, mas só vamos saber quando virmos como os próximos dias se desenrolam."
That is the reality for Chelsea now. European qualification is still there, but only if they handle the pressure better than the teams around them. Final-day matches can become chaotic, and the clubs that cope best are usually the ones with their key players fit enough to decide moments.
Everything now points to the final training sessions. By Sunday, Chelsea will hope uncertainty has given way to clarity - because the next storyline is simple: Europe or regret.