Marc Guiu made his first competitive start in Chelsea colours during Thursday night’s win over Servette, but he’s likely to remember the game for all the wrong reasons. Chelsea recorded a 2-0 home victory against Servette yesterday in the first leg of a Conference League play-off tie. Therefore, they’ll travel to Switzerland next week for the second leg with a healthy aggregate advantage. Christopher Nkunku’s goal broke the deadlock in the 50th minute with his penalty kick. Afterwards, substitute Noni Madueke fired in a great goal to double the advantage and give the Blues one foot in the Conf…