I don't think these two teams can give Real Madrid or Barcelona a hard time. Real Madrid and Barcelona will win these matches without any problems. Also, since the situation is at a critical level in the league, I think Real Madrid will play the matches more focused and win most of their matches. The Arsenal defeat may have been a shake-up match for them. Perhaps such a defeat was necessary on the way to becoming a strong Real Madrid again.
Leganes and Alaves are the teams at the bottom of the standings, they should not trouble Barcelona and Madrid. This week should be 3 points for them. Atletico will also face a weak team Valladolid, it should not be a threat to them and the standings will not change for this week. Barcelona will still be at the top, followed by Madrid and Atletico.