For the first fixture, I will give it to Roma, This is because Bologna do not seem like they have the capacity to defeat Roma, even if I want to judge them by their past performances in the previous season, they are not a match with Roma and cannot do as much with Roma so I think it is mostly better that we just maintain a regular expectation from both team because even Roma I will not advise we throw our full weight of expectations on them all at once.
Roma and Bologna are almost same in quality two latest seasons but there are changes in Roma this summer from Gasperini at their head coach position to some players bought for quality improvement. All these can help Roma to be stronger than Bologna and increases their chance of beating Bologna in this match. Roma must earn as most points as possible in this season for finishing it within top four. A first match of season against Bologna will be one of many important matches for Roma with a best result is three points that they need to chase and achieve as most regularly as possible in this season.
Modric is certainly not the same as he was when he was younger, and he will certainly not play like he used to.
AC Milan certainly has a strong reason to bring in Modric. They want him to be a mentor for their young players. Modric has certainly achieved many achievements at his former club. Modric's extensive experience will certainly give AC Milan the potential to emulate Modric's excellent performances and numerous awards with his former club.
No old players can have bodies and performances like they did at younger ages and Modric is not the exception. At his old age now, he will play with considerable dependence on his experience and skills as well as support from his teammates in order to cover his physical weakness, lower speed while he needs to maximize his great passing skills and his vision on field too.