t Fighting among pigs is a normal behavioural pattern to establish a stable rank order. Enhanced aggressivebehaviour in pigs in groups lead to increasing stress and injuries especially in mixing situations used asa common procedure in modern pig production systems. In such systems, it is usually not possible toavoid re-housing with unacquainted conspecifics. Hence, due to the lavish analysis of direct or videoobservations of the agonistic interactions in such mixing situations, there is a necessity to receive easymeasurable and practical indicators for predicting individual agonistic behaviour. Possible indicatorsare standardised behavioural tests such as the backtest and the human approach test. The backtest wasperformed twice. In each test, the pigs were laid on their backs and held loosely for one minute (n = 1382).The number of escape attempts (NEA) was recorded. In addition to this test, a human approach test wasperformed four times with weaned pigs (n = 1318) and once with gilts (n = 272). Here, the stockpersonrecorded the latency of the pigs to approach and touch the person, i.e. the latency count (LC). The agonisticinteractions were recorded in a video observation period of 17 h while the traits number of fights (NF) andnumber of initiated fights (IF) were recorded in mixtures of weaned pigs (n = 1111), growing pigs (n = 446)and gilts (n = 279). The estimations of phenotypic and genetic correlations between these different traitswere carried out with animal models in bivariate analyses. The IF trait of weaned pigs and NEA wereslightly positively correlated (rg= 0.18). Pigs which initiated more fights after weaning had more escapeattempts in the backtests. However, there were negative genetic correlations between the agonisticinteractions traits NF and IF traits and the NEA backtest trait of growing pigs (rg= −0.14 and rg= −0.28).The genetic relation between the agonistic NF and IF traits of weaned pigs and the human approach test LCtrait of weaned pigs were on a medium level (rg= −0.50 and rg= −0.45). The genetic correlations betweenIF and NF of growing pigs and gilts and the human approach test LC trait in weaned pigs were lower butalso negatively correlated. Hence, pigs with more NF and IF in mixing had shorter latencies during the human approach tests. Concluding, the back test and the human approach test might be able to predictthe agonistic behaviour of pigs in mixing situations. Nevertheless, the reliability of the predictions of the behavioural tests depends on the age of the pigs at mixing and the previous experiences of these animals.